%0 Journal Article %A N. E. Tovmasyan %T On the theory of singular integral equations %J Differencialʹnye uravneniâ %D 1967 %P 69-80 %V 3 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1967_3_1_a6/ %G ru %F DE_1967_3_1_a6