%0 Journal Article %A V. B. Korotkov %T Some unsolved problems of the theory of integral operators %J Matematičeskie trudy %D 1996 %P 187-196 %V 31 %I mathdoc %U http://geodesic.mathdoc.fr/item/MT_1996_31_a5/ %G ru %F MT_1996_31_a5