%0 Journal Article %A M. G. Gasymov %T On the solvability of boundary value problems for a class of operator differential equations %J Doklady Akademii Nauk %D 1977 %P 505-508 %V 235 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1977_235_3_a0/ %G ru %F DAN_1977_235_3_a0