%0 Journal Article %A Yu. K. Lando %A Yu. A. Bykadorov %T Nonnormally solvable and controllable integro-differential correspondences %J Differencialʹnye uravneniâ %D 1980 %P 344-349 %V 16 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1980_16_2_a16/ %G ru %F DE_1980_16_2_a16