N. Bitoulas

Accuracy and effectiveness of preconditioned conjugate gradient algorithms for large and ill-conditioned problems

M. Papadrakakis, N. Bitoulas, 1993 .

An effective superelement-by-superelement solution method for large finite element computations

M. Papadrakakis, N. Bitoulas, K. Hatjikonstantinou, 1991 .

An optimized computer implementation of incomplete Cholesky factorization

Manolis Papadrakakis, M. Papadrakakis, N. Bitoulas, 1994 .