%0 Journal Article %A Yu. T. Antokhin %T Incorrect problems in Hilbert space and stable methods of solving them %J Differencialʹnye uravneniâ %D 1967 %P 1135-1156 %V 3 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1967_3_7_a12/ %G ru %F DE_1967_3_7_a12