%0 Journal Article %A A. V. Bitsadze %T A class of conditionally solvable nonlocal boundary value problems %J Doklady Akademii Nauk %D 1985 %P 521-524 %V 280 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1985_280_3_a0/ %G ru %F DAN_1985_280_3_a0