%0 Journal Article %A I. A. Kuzin %T On equations with noncompact indefinite operators %J Differencialʹnye uravneniâ %D 1993 %P 392-401 %V 29 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1993_29_3_a2/ %G ru %F DE_1993_29_3_a2