List of journal publications

[107]. O. Iliev, R. Lazarov, J. Willems, Numerical study of two-grid preconditioners for 1-D elliptic problems with highly oscillating discontinuous coefficients, Computational Methods in Applied Mathematics, 7 (1) (2007), 48--67.

[106]. K. Kachiashvili, D. Gordeziani, R. Lazarov and D. Melikdzhanian, Modeling and simulation of pollutants transport in rivers, Applied Mathematical Modelling, 31 (7) (2007), 1371--1396.

[105]. R.D. Lazarov, S. Lu, and S.V. Pereverzyev, On the balancing principle for some problems of numerical analysis, Numerische Mathematik, 23 (4) (2007), 659--689 (also as RICAM Techinical Report #25 )

[104]. R.D. Lazarov and S.D. Margenov, CBS constants for graph-Laplacians and application to multilevel methods for discontinuous Galerkin systems, Joural of Complexity, 23 (4-6) (2007), 498--515 (also as RICAM Techinical Report #28 ).

[103]. V.A. Dobrev, R.D. Lazarov, P.S. Vassilevski, and L.T. Zikatanov, Two-level preconditioning of discontinuous Galerkin approximations of second order elliptic equations, Numer. Linear Algebra Appl., 13 (9) (2006), 753--770 # MR2269798

[102]. R.E. Ewing, O.P. Iliev, R.D. Lazarov, and A. Naumovich, On convergence of certain finite volume difference discretizations for 1-D poroelasticity interface problems, On convergence of certain finite volume difference discretizations for 1-D poroelasticity interface problems, Numer. Methods for Partial Differential Equations, 23 (3) (2007), 652-671.

[101]. R.D. Lazarov and X. Ye, Stabilized discontinuous finite element approximations for Stokes equations, J. Comput. Appl. Math. , 198 (1) (2007), 236--252. # MR2250399

[100]. P. Chatzipantelidis, R.D. Lazarov, V. Thomee, and L. Wahlbin, Parabolic finite element equations in convex polygonal domains, , BIT Numerical Mathematics. , 43 (Suppl. 1) 2006, S113-S143. # MR2269798

[99]. R.D. Lazarov and L.T. Zikatanov, An exponential fitting scheme for general convection-diffusion equations on tetrahedral meshes, Technical Report ISC-04-15-MATH , Texas A& M University, Comput. Appl. Math., (Obchysljuval'na ta prykladna matematyka, Kiev), 1 (92) (2005), 60-69.

[98]. C.C. Douglas, Y. Efendiev, R.E. Ewing, V. Ginting, R.D. Lazarov, M.J. Cole, G. Jones, Least-squares approach for data recovery in dynamic data-driven applications simulations, submitted to Journal of Computing and Visualization in Science

[97]. A. Kurganov, R. Lazarov, D. Levy, G. Petrova, and B. Popov, Eitan Tadmor - 50, Comput. Meth. Appl. Math. , 4 (3) (2004), 265 -- 270.

[96]. A .B. Andreev, R.D. Lazarov, and M.R. Racheva, Postprocessing and Higher Order Convergence of Mixed Finite Element Approximations of Biharmonic Eigenvalue Problems, J. Comput. Appl. Math. , 182 (2) (2005) 333 -- 349 (also Technical Report ISC-04-04-MATH , Texas A& M University) # MR2147872 (2006d:65127)

[95]. P. Chatzipantelidis, V. Ginting, and R.D. Lazarov, A finite volume element method for nonlinear elliptic problems, Numer. Linear Algebra Appl. , 12 (2005) 515 -- 546 (also Technical Report ISC-04-06-MATH , Texas A& M University), # MR2150166 (2006f:65115)

[94]. V. Ginting, R. Ewing, Y. Efendiev, and R. Lazarov, Upscaled modeling for multiphase flow, Comput. Appl. Math. , 23 (2-3) , (2004) 213 -- 233 (also Technical Report ISC-03-05-MATH , Texas A& M University) # MR2146982 (2005m:76167)

[93]. P. Chatzipantelidis and R.D. Lazarov, Error estimates for finite volume element method for elliptic PDE's in nonconvex polygonal domains SIAM J. Numer.Anal. , 42 (5) (2005) 1932 -- 1958 (also Technical Report ISC-03-04-MATH , Texas A& M University) # MR2139231 (2006f:65108)

[92]. P. Chatzipantelidis, R. Lazarov, and V. Thomee, Error estimates for the finite folume element method for parabolic equations in nonconvex polygonal domains Numer. Methods for Partial Diff. Equations , 20 (5) (2004), 650 - 674. # MR2076342 (2005g:65122)

[91]. C. Carstensen, R.D. Lazarov, and S. Tomov, Explicit and averaging a posteriori error estimates for adaptive finite volume methods, SIAM J. Numer.Anal. , 42 (6) (2005) 2496 -- 2521 (also as Isaac Newton Institute for Mathematical Sciences, (2003), Cambridge University, UK) # MR2139403 (2006b:65165)

[90]. R.D. Lazarov, J.E. Pasciak, J. Schoberl, and P.S. Vassilevski, Almost optimal interior penalty discontinuous approximation of symmetric elliptic problems on non-matching grids, Numerische Mathematik , 96 (2) , (2003) 295--315. # MR2021492 (2004j:65205)

[89]. R.D. Lazarov and S.Z. Tomov, A posteriori error estimates for finite volume element approximations of convection-diffusion-reaction equations, Technical Report ISC-00-02-MATH, Texas A& M University, Computational Geoscienes, 6 (3-4) (2002) 483 - 503. # MR1956027 (2004b:65166)

[88]. R.E. Ewing, A. Ibragimov, and R.D. Lazarov, Domain decomposition algorithm and analytical simulation of coupled flow in reservoir/well system, J. Korea SIAM , 5 (2) (2001), 71-99.

[87]. R.D. Lazarov, S.Z. Tomov, and P.S. Vassilevski, Interior penalty discontinuous approximations of elliptic problems, Technical Report ISC-00-04-MATH, Texas A& M University, Comput. Methods Appl. Math., 1 (4) (2001), 367-382

[86]. C. Kim, R.D. Lazarov, J.E. Pasciak, and P.S. Vassilevski, Multiplier spaces for the mortar finite element method in three dimensions, SAM Numer. Anal. , 39 (2) (2001), 519-538 (also as Technical Report ISC-00-07-MATH, Texas A& M University). # MR1860265 (2002g:65143)

[85]. R.D. Lazarov, J.E. Pasciak and P.S. Vassilevski, Iterative solution of a conbined mixed and standard Galerkin discretization method for elliptic problems, Technical Report, ISC-99-03-MATH, Texas A& M University Numer. Linear Algebra Appl., 8 (2001), 13-31.

[84]. J. Bramble, R. Lazarov, and J. Pasciak, Least-squares methods for linear elasticity based on a discrete minus one inner product, Technical Report ISC-99-05-MATH, Texas A&M University , Computer Meth. Appl. Mech. Engrg., 191 (2001) 727--744. # MR1870517 (2002i:65123)

[83]. R.E. Ewing, O.P. Iliev, and R.D. Lazarov, A modified finite volume approximation of second-order elliptic equations with discontinuous coefficients, Technical Report, ISC-99-01-MATH, Texas A& M University SIAM Sci. Comput., 23 (4) (2001), 1334--1350. # MR1885604 (2003c:65104)

[82]. R. Ewing, R. Lazarov, T. Lin, and Y. Lin, Mortar finite volume element approximations of second order elliptic problems, Technical Report ISC-99-08-MATH, Texas A&M University , East-West J. Numer. Math., v. 8 (2000), 168-183.

[81]. R.E. Ewing, R.D. Lazarov, and Y. Lin, Finite volume element approximations of non-local reactive flows in porous media, Technical Report ISC-98-07-MATH, Texas A& M University, Numerical Methods for PDEs, v. 16 (2000), pp. 285--311.

[80]. R.E. Ewing, R.D. Lazarov, and Y. Lin, Finite volume element approximations of non-local in time one-dimensional reactive flows in porous media, Technical Report ISC-98-06-MATH, Texas A& M University, Computing, v. 64 (2000) pp. 157--182.

[79. R.E. Ewing, R.D. Lazarov, S.L. Lyons, D. Papavassiliou, and J.E, Pasciak, Numerical Well Model fof Non-Darcy Flow, Computational Geosciences, v.3 (1999), 185--204.

[78]. R.D. Lazarov, L. Tobiska, and P. Vassilevski, Stream-line diffusion least-squares mixed finite element methods for convection-diffusion problems, East-West J. of Numerical Mathematics, v. 5 (1997), No.4, pp. 321-335.

[77]. J. Bramble, R. Lazarov, and J. Pasciak, Least-squares for second order elliptic problems, Comput. Meth. Appl. Mech. Engn., v. 152 (1998), Nos.1-2, pp. 195-210.

[76]. H.S. Chen and R.D. Lazarov, Domain splitting algorithm for mixed finite element approximations to parabolic problems, East-West J. of Numerical Mathematics, v. 4 (1996), 121-135.

[75]. H.S. Chen, R.E.Ewing, and R.D. Lazarov, Superconvergence of the mixed finite element methods for parabolic problems with nonsmooth initial data, Technical Report ISC_08-94-MATH, Texas A&M University, Numer. Mathematik, v. 78 (1998), 495-521.

[74]. Z. Chen, R. Ewing, R. Lazarov, Yu. Kuznetsov, and S. Maliassov, Multilevel preconditioners for mixed methods for second order elliptic problems, Numer. Lin. Alg. Appl., 3 (5) (1996), 427 - 453.

[73]. R.D. Lazarov and P.S. Vassilevski, Preconditioning saddle-point problems arising from mixed finite element discretizations of elliptic equations, Numer. Lin. Algebra Appl., v. 3 (1) (1996), 1 - 20.

[72]. Z. Chen, R. Ewing, and R. Lazarov, Domain decomposition algorithms for mixed methods for second order elliptic problems, Math. Comp., v. 65 (1996), 467 - 490.

[71]. J.H. Bramble, R.D. Lazarov, and J.E. Pasciak, A least-squares approach based on a discrete minus one inner product for first order systems, Math. Comp., 66 (1997), 935 - 955.

[70]. R.D. Lazarov, I.D. Mishev, and P.S. Vassilevski, Finite volume approximation of convection-diffusion problems on grids with local refinement, Computing, v. 53 (1) 1994, 33-57. MR# 95f:65196

[69]. P.S. Vassilevski, S. Petrova, and R.D. Lazarov, Preconditioning elliptic problems on grids with multilevel local refinemnet, Methematica Balkanica, v. 8 (2-3) (1994), 179 - 196.

[68]. R.E. Ewing, R.D. Lazarov, and A. Vassilev, Finite difference schemes for parabolic problems on composite grids with refinement in time and space, SIAM J. Numer. Anal., v. 31 (6) (1994), 1605-1622. MR# 95j:65095

[67]. R.D. Lazarov, I.D. Mishev, and P.S. Vassilevski, Finite volume methods for convection-diffusion problems, SIAM J. Numer. Anal., v. 33 (1) (1996), 31 - 55

[66]. R.E. Ewing and R.D. Lazarov, Approximation of parabolic problems on grids locally refined in time and space, Appl. Numerical Mathematics, v. 14 (1994), 199-211

[65]. Z. Cai, R.D. Lazarov, T.A. Manteuffel, and S.F. McCormick, First order systems least-squares for partial differential equations: I Discretization, SIAM J. Numer. Anal., v. 31 (6) (1994), 1785-1799. MR# 95f:65133

[64]. G. Carey, R.D. Lazarov, and A. Pehlivanov, Least-squares mixed finite elements for second order elliptic problems, SIAM J. Numer. Anal., v 31 (5) (1994), 1368-1377. MR#95i:65206

[63]. R.E. Ewing, J.E. Pasciak, R.D. Lazarov, and P.S. Vassilevski, Domain decomposition type iterative techniques for parabolic problems on locally refined grids, SIAM J. Numer. Anal., v. 30, 1993, N 6, 1537-1557, MR# 95i:65094

[62]. R.E. Ewing, R.D. Lazarov, and A. Vassilev, Adaptive techniques for time-dependent problems, Comp. Meth.Appl. Mech. and Eng., v. 101, 1992, N 3, 113-126

[61]. A.I. Pehlivanov, G. Carey, R.D. Lazarov, and Y. Shen) Convergence analysis of the least-square mixed finite elements Computing, v. 51, 1993, 111-123. MR# 95b:65096

[60]. R.E. Ewing and R.D. Lazarov, Superconvergence of the mixed finite element approximations of parabolic problems using rectangular finite elements (with R.Ewing), East-West J. Numer. Mathematics, v.1, 1993, N3, 199-212. MR# 94m:65158

[59]. P.S. Vassilevski, R.D. Lazarov, and S.I. Petrova, Finite difference schemes on triangular cell-centered grids with local refinement, SIAM J. Statistical and Scientific Computation, v. 13, (1992), N6, 1287-1313

[58]. R.E. Ewing, R.D. Lazarov, and J. Wang, Superconvergence of the velocity along the Gauss lines in the mixed finite element methods, SIAM J. Numer. Anal., v.28, (1991), 4, 1015-1029

[57]. S. Chow, G. Carey, and R.D. Lazarov, Natural and postprocessed superconvergence in semi-linear problems, Numer. Methods for Partial Diff. Equations, v.7, (1991) 4, 245-259

[56]. R. Ewing, R. Lazarov, and P. Vassilevski, Finite difference schemes on grids with local refinement in time and in space for parabolic problems.II. Optimal order two-grid iterative methods. Notes on Numerical Fluid Mechanics, W.Hackbusch (Ed.) v.25 (1990), 70-93

[55]. R. Ewing, R. Lazarov, and P. Vassilevski, Finite difference schemes on grids with local refinement in time and in space for parabolic problems.I.Derivation, stability and error analysis, Computing, v.45, 1990, 193-215

[54]. R.D. Lazarov, V. Manolov, A. Yotova, and Tz. Rashev, Investigation of temperature fields of steel metallurgical blocks by the finite element method, Comptes Rend. l'Acad. Bulg. Sci., v.42 (1989), 4, 51-54

[53]. R.E. Ewing, R.D. Lazarov, and P.S. Vassilevski, Local refinement techniques for elliptic problems on cell centered grids. III. Algebraic multilevel BEPS preconditioners, Numer. Mathematik, v. 58 (1991), 5, 431-452

[52]. R.E. Ewing, R.D. Lazarov, and P.S. Vassilevski, Local refinement techniques for elliptic problems on cell centered grids. II. Two-grid iterative methods, J. Numerical Linear Algebra and Applications, v. 1 (4) (1994), 337-368

[51]. R.E. Ewing, R.D. Lazarov, and P.S. Vassilevski, Local refinement techniques for elliptic problems on cell centered grids. I. Error analysis, Math. Comp., v. 56, (1991), N 194, 437-461

[50]. A. Pehlivanov, G.F. Carey, S.S.Show, and R.D. Lazarov, Superconvergence analysis of the approximate boundary-flux calculations, Numer. Math., v. 63 (1992), 483-501

[49]. S. Chow and R.D. Lazarov, Superconvergence analysis of flux computations for nonlinear two-point boundary value problems, Preprint CMA-R09-88, Australian Nat. University (1988) and Bull.Austr.Math.Soc., v.40 (1989), 465-480, Zb#676.65096

[48]. K.N. Godev, R.D. Lazarov, V.L. Makarov, and A.A. Samarskii, Homogeneous difference schemes for one dimensional problems with generalized solutions, Math. USSR Sbornik, v.59(1) (1988), 155-179, MR#88h:65145, Zb#621.65094

[47]. A.B. Andreev and R.D. Lazarov, Superconvergence of the gradient for quadratic triangular finite elements, Numerical Methods for Partial Diff. Equations, v.4(1) (1988), 15-32, Zb#644.65082

[46]. A.B. Andreev and R.D. Lazarov, Lumped mass finite element method for parabolic and eigenvalue problems, Mathematika Balkanica, New Series, v.2(1) (1988),84-92, Zb#000.65108

[45]. R.D. Lazarov and V. Pasheva, Boundary element method for 2-D problems of ideal fluid flows with free boundaries, Adv. Water Resources, v.12 (1989), 37-45

[44]. K.N. Godev and R.D. Lazarov, Error estimates of finite difference schemes for parabolic equations with generalized solutions, Ann. de l'Universite de Sofia "Kl. Ohridski", Fac. de Math., v.79(1) (1985),403-413

[43]. R.D. Lazarov and P. Peykov, Modelling and investigation by simulation of semiconductor pressure sensors, Bulg. J. Physics, v.14(6) (1987), 530-541

[42]. R.D. Lazarov and V.L. Makarov, Difference schemes of second order accuracy for the axially symmetric Poisson equation on generalized solutions, Soviet Math. Dokl., v.25 (1982), 15-19, MR #83h:65114, Zb#488.65041

[41]. K.N. Godev and R.D. Lazarov, On the convergence of the difference scheme for the second boundary value problem for the biharmonic equation with solution from W^m , Math. Models in Phys. Chem. and Numerical Methods of Their Realization, Teubner-texte zur Math., v.61 (1985), 130-141, MR#87b:65175, Zb #542.65054

[40]. R.D. Lazarov, W. Weinelt and U. Streit, On the convergence order of difference schemes for weak solutions of the heat equation, Diff. Equations, v.20(7) (1984) (Russian), MR #86b:65105, Zb # 554. 65068

[39]. K.N. Godev and R.D. Lazarov, Error estimates of finite difference schemes in L_p-metrics for parabolic boundary value problems, Comptes Rend. l'Acad. Bulg. Sci., v.37 (1984), 565-568, Zb #567.65069, MR#86e:65137

[38]. R.D. Lazarov, V.L. Makarov, and W. Weinelt, On the convergence of difference schemes for the approximation of solutions u from W^m (m>0.5) of elliptic equations with mixed derivatives, Numer. Math., v.44 (1984), 223-232, MR #86f:65181,Zb #525.65069

[37]. I.Gavriliuk, R. Lazarov, V. Makarov. I. Pirnazarov, Estimates of the rate of convergence of difference schemes for fourth order elliptic equations, USSR J. Comput. Math. and Math. Physics, v.23(2) (1983), 64-70, MR #85g:65115, Zb#541.65064

[36]. R.D. Lazarov, V.L. Makarov, and A.A. Samarskii, Application of exact difference schemes to the construction and study of difference schemes for generalized solutions, Math. USSR Sbornik, v.45(4) (1983), 461-171, MR #84g:65137, Zb #512.65068

[35]. I.Gavriliuk, R. Lazarov, V. Makarov. I. Pirnazarov, Error estimates for difference schemes for the second boundary value problem of biharmonic equation with minimal requirements of smoothness, Dop. Acad. Sci. Ukrain. SSR, ser. A, 2 (1983), 6-9, MR #85j:65039, Zb #541.65063

[34]. R.D. Lazarov, V.L. Makarov, and W. Weinelt, On the convergence of difference schemes for elliptic equations with mixed derivatives and generalized solutions, Diff. Equations, v.19(7) (1983), 838-843, MR #85a:65153, Zb #547.65069

[33]. R.D. Lazarov and Yu.I. Mokin, On the computation of the logarithmic potential, Soviet Math. Dokl., v.28 (1983), 320-323, MR #86d:31008, Zb #567.65070

[32]. R.D. Lazarov, On the numerical solution of some axially-symmetric elastic problems by finite difference method, Diff. Equations, v.19(3) (1983), 500-507 (Russian), MR #84f:65076, Zb#534.73066

[31]. I. Dimov, Bl. Sendov, V. Manolov, R. Lazarov, T. Rashev, Mathematical modelling of crystalization of steel blocks, Trudy Inst. of Metallurgy, v.14(1) (1983), 93-102 (with I.Dimov et al., Bulgarian)

[30]. R.D. Lazarov, Convergence of difference method for parabolic equations with generalized solutions, Pliska, v.5 (1982), 51-59 (Russian), MR #84m:65105, Zb #563.65063

[29]. R.D. Lazarov, Error estimates of the finite difference schemes for parabolic problems on generalized solutions, Comptes Rend. l'Acad. Bulg. Sci., v.35(1) (1982), 7-10 (Russian), MR #84a:65081 Zb #524.65067

[28]. R.D. Lazarov, On the convergence of the finite difference schemes for Poisson equation in discrete H^1-norms, p=2, Wiss. Beitr. IH Wismar, v.7 (1982), 86-90

[27]. R.D. Lazarov and Yu.I. Mokin, On the convergence of the difference schemes for Poisson equation in L_p-metrics, Soviet Math. Dokl., v.24 (1981), 590-594, MR #83d:65272, Zb #524.65066

[25]. R.D. Lazarov and V.L. Makarov, Difference schemes of second order of accuracy for the axisymmetric Poisson equation with generalized solutions, USSR J. Comput. Math. and Math. Phys, v.21(5) (1981), 95-107, MR #84b:65100, Zb #485.65066

[25]. R.D. Lazarov, On the convergence of the difference schemes for some axisymmetric problems of mathematical physics in classes of generalized solutions, Soviet Math. Dokl., v.23 (1981), 667-670 MR#83h: 65115, Zb #524.65065

[24]. R.D. Lazarov and V.L. Makarov, Convergence of the difference methods and the methods of lines for multidimensional problems in classes of generalized solutions, Soviet Math. Dokl., v.23 (1981), 69-73, MR #83a:35004, Zb #485.65069

[23]. R.D. Lazarov, Convergence of finite difference schemes on generalized solutions of the biharmonic equation on a rectangle, Diff. Equations, v.17 (7) (1981), 836-842, MR #83h:65116, Zb #485.65068

[22]. R.D. Lazarov, On the convergence of the difference schemes for Poisson equation with generalized solutions, Diff. Equations, v.17 (7) (1981), 829-836, MR #83f:65169, Zb #485.65067

[21]. K. Gergiev and R.D. Lazarov, An error estimate for the decomposed finite element solution of the polyharmonic equation, Mathematics - Revue d'Analyse Numerique et de Theorie d'Approximation, v.23 (1981), 31-34 (K.Georgiev), MR#83g:65106, Zb #477.57015

[20]. I. Dimov, Bl. Sendov, V. Manolov, R. Lazarov, T. Rashev, Mathematical modelling of heat conduction in ingot casting of stainless steel, Metallurgy, v.36 (1981),3-5 (Russian)

[19]. R.D. Lazarov and E. Varbanova, Numerical solution of a coupled problem of elasticity, Ann. VUZ, Appl. Math., v.16(4) (1980), 179-191 (Bulgarian), MR # 83d:73080b, Zb# 497.73005

[18]. I. Dimov, Bl. Sendov, V. Manolov, R. Lazarov, Mathematical models of cristalization of block of nitrogen steel, casted in cylindrical forms, Material Sci. and Technology, v.9 (1980), 63-68 (Bulgarian)

[17]. R.D. Lazarov and E. Varbanova, Difference schemes for 1-D coupled dynamic problems of thermoelasticity, Ann. VUZ Appl. Math., v.16 (4) (1980), 167-178, (Russian), MR # 83d:73080a, Zb# 497.73004

[16]. R.D. Lazarov and G. Meladze, Factorized schemes for the dynamic problems of elastic vibrations of an unbounded strip, Trudy Tbilissi State University, v.207 (1979), 14-26 (Russian), Zb # 462.73038

[15]. K. Ganev and R.D. Lazarov, An application of the splitting method for solving some problems of mesometeorology, Bulgarian Geophysical J., v. 5 (1979), 11-21 (Russian)

[14]. R.D. Lazarov, Factorized finite difference schemes of second order accuracy for solving dynamic problems of elasticity, Comptes Rend. de l'Acad. Bulg. Sci., v.32 (1979), 1, 7-10 (Russian), Zb # 432.73079 MR# 80f:65133

[13]. R.D. Lazarov and G. Meladze, On the application of difference schemes for solving the problem of a vibrating elastic strip, Bull. Acad. Sci. Georgian SSR, v.83 (1976), 17-21 (Russian)

[12]. R.D. Lazarov, Difference schemes of second order accuracy for the axisymmetric problems of elasticity in a cylinder, Comptes Rend. de l'Acad. Bulg. Sci., v.29 (1976), 21-24 (Russian), Zb# 366.73011

[11]. R.D. Lazarov and L.Stoyanov, Difference schemes for mixed boundary value problems of elasticity on triangular grids, Comm. VMEI Gabrovo, v.8 (1976), 53-62 (Bulgarian)

[10]. P. Gospodinov, G. Saev, and R. Lazarov, Computing transient temperature fields by the finite element method, Mashinostroenie, v.1 (1976), 23-26 (Bulgarian)

[9]. R.D. Lazarov and P.Panayotov, Solving an axially-symmetric elastic problem by projection difference method, Ann. VUZ, Applied Mathematics, v.12 (2) (1976) (Bulgarian), Zb# 432.73080

[8]. R.D. Lazarov, A factored scheme for an axially-symmetric dynamic problem of elasticity, Ann. VIZ, Appl. Mathematics, v.11 (2) (1975), 103-112 (Russian), Zb# 395.73076

[7]. Chr. Butzev, A. Hachikian, and R.D. Lazarov, On calculation of axially-symmetric electric fields, Ann. Ecole Superieur de Mines et de Geologie, v.21 (1) (1975), 133-140 (Bulgarian)

[6] R.D. Lazarov and E. Varbanova Numerical solution to mixed boundary value problems of elasticity in orthotropic cylinders, Ann. VUZ, Appl. Math., v.10 (4) (1974) (Bulgarian), Zb# 343.73011

[5]. R.D. Lazarov and Yu.I. Mokin, On the stability of elliptic difference schemes, USSR J. Comput. Math. and Math. Physics, v.13 (2) (1973), 282-291 (Russian), Zb # 432.73079

[4]. R.D. Lazarov, Difference schemes for problems of elasticity in domains with curvilinear boundaries. II. Error estimate. Numerical experiments, Theoretical and Appl. Mech., v.4 (2) (1973), 133-124 (Russian)

[3]. R.D. Lazarov, Difference schemes for problems of elasticity in domains with curvilinear boundaries. I. Construction of the difference scheme. A priori estimate. Theoretical and Appl. Mech., v.2 (4) (1972), 19-30 (Russian)

[2]. R.D. Lazarov, Variational-difference schemes for axisymmetric problems of elasticity, Seminar of the Inst. Appl. Math., Georgian State Univ., 5 (1971), 77-83 (Russian).

[1]. R.D. Lazarov, Difference schemes for the second boundary value problem of elasticity for domains with curved boundaries, USSR J. Comp. Math. and Math. Physics, v.11 (4) (1971), 166-179.