TY - JOUR AU - A. B. Andreev AU - R. D. Lazarov TI - Lumped Mass Finite Element Method for Parabolic and Eigenvalue Problems JO - Mathematica balkanica PY - 1988 SP - 85 VL - 2 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MABA_1988_2_1_a9/ ID - MABA_1988_2_1_a9 ER -