%0 Journal Article %A M. E. Drakhlin %T Some topological properties of a certain integral operator %J Differencialʹnye uravneniâ %D 1972 %P 721-724 %V 8 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1972_8_4_a17/ %G ru %F DE_1972_8_4_a17