%0 Journal Article %A A. A. Samarskii %A I. V. Fryazinov %T Difference approximation methods for~problems of~mathematical physics %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1976 %P 179-213 %V 31 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1976_31_6_a9/ %G en %F RM_1976_31_6_a9