%0 Journal Article %A B. G. Gabdulkhaev %T Finite-dimensional approximations of singular integrals and direct methods for solving singular integral and integro-differential equations %J Itogi nauki i tehniki. Seriâ, Matematičeskij analiz %D 1980 %P 251-307 %V 18 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTM_1980_18_a4/ %G ru %F INTM_1980_18_a4