%0 Journal Article %A V. D. Kupradze %T On the approximate solution of problems in mathematical physics %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1967 %P 58-108 %V 22 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1967_22_2_a2/ %G en %F RM_1967_22_2_a2