PUBLICATIONS:

· Well-posed constraint-preserving boundary conditions for the AA formulation of Einstein's equations, Journal of Mathematical Analysis and Applications, vol. 359 (2009), no. 2, 711--721.

· Positive radial symmetric solutions to an exterior elliptic Robin boundary-value problem and application, Nonlinear Analysis: Theory, Methods & Applications, vol. 71 (2009), no. 5-6, 1909--1915.

· Generalized Finite Element Method for Second Order Elliptic Operators with Dirichlet Boundary Conditions, J. Comput. Appl. Math., vol. 218 (2008), pp. 175-183 (joint work with I. Babuska and V. Nistor).

· Approximate Dirichlet boundary conditions in the Generalized Finite Element Method, Mathematical Models and Methods in Applied Sciences, vol. 17 (2007), no. 12, pp. 2115-2142 (joint work with I. Babuska and V. Nistor).

· Boundary conditions for the Einstein-Christoffel formulation of Einstein’s equations, Electron. J. Differ. Equ. Conf., 15 (2007), pp. 11—27 (joint work with D. Arnold).

· Existence of the minimal positive solution of some nonlinear elliptic systems when the nonlinearity is the sum of a sublinear and a superlinear terms, Appl. Math. Mech. 21 (2000), no. 3, 283--290.

· Solvability of an elliptic system with discontinuous nonlinearity and $L\sp 1$ data, Comm. Appl. Nonlinear Anal. 6 (1999), no. 3, 49--58.

· Positive solutions of some nonlinear elliptic equations involving the $p$-Laplacian with Neumann boundary condition, Rev. Roumaine Math. Pures Appl. 44 (1999), no. 1, 143--151.

· The non-existence of a positive solution for some nonlinear elliptic problems in unbounded domains, Sci. Math. 2 (1999), no. 1, 95--97.

· On the positive solution of a class of semilinear elliptic equations on a bounded domain, Studia Univ. Babes-Bolyai Math. 42 (1999), no. 2.

· A class of Dirichlet boundary value problems which admit infinitely many solutions, Sci. Math. 1 (1998), no. 3, 383--387.

· On a reaction-diffusion system involving the critical exponent, Rev. Mat. Complut. 11 (1998), no. 2, 461--472.

· Positive solutions of nonlinear elliptic equations involving the $p$-Laplacian and indefinite nonlinearities, Panamer. Math. J. 8 (1998), no. 3, 31--42.

· Existence of positive solutions of some nonlinear Neumann problems, An. Univ. Craiova Ser. Mat. Inform. 23 (1998), 9--18.

· About the generalized Jacobians, An. Univ. Ovidius Constanta Ser. Mat. 5 (1997), no. 1, 139--146.

· About some semilinear elliptic equations in a bounded convex domain with Dirichlet boundary conditions, Stud. Cerc. Mat. 48 (1996), no. 5-6, 393--407.

· Positive solution of some nonlinear elliptic equation with Neumann boundary conditions, Proc. Japan Acad. Ser. A Math. Sci. 71 (1995), no. 7, 161--163.

· Existence and behavior of positive radial symmetric solutions for the problem $-\Delta u=\lambda u\vert u\vert \sp{q-1}+u\vert u\vert \sp {p-1}$ in $ R\sp N (N\geq 2)$}, An. Univ. Craiova Ser. Mat. Inform. 21 (1995), 28--37.

· One result of Cauchy-Lagrange type, An. Univ. Timisoara Ser. Mat.-Inform. 32 (1994), no. 2, 123--127.

· Estimates for positive solutions of some nonlinear elliptic equations, An. Univ. Craiova Ser. Mat. Inform. 19 (1994), 70--73.

· On the ratio of the first two eigenvalues of the Laplacian, Matarom 2 (1992), Laboratoire d'Analyse Numerique, Univ. Pierre et Marie Curie (Paris VI).