%0 Journal Article %A V. G. Ogandzhanyan %T Existence theorems for singular integral equations with discontinuous operator %J Differencialʹnye uravneniâ %D 1969 %P 1642-1651 %V 5 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1969_5_9_a10/ %G ru %F DE_1969_5_9_a10