%0 Journal Article %A G. B. Savchenko %T Well-posedness of a nonlocal boundary value problem %J Differencialʹnye uravneniâ %D 1985 %P 1450-1453 %V 21 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1985_21_8_a24/ %G ru %F DE_1985_21_8_a24