%0 Journal Article %A V. S. Il'kiv %T A multipoint nonlocal problem for partial differential equations %J Differencialʹnye uravneniâ %D 1987 %P 487-492 %V 23 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1987_23_3_a15/ %G ru %F DE_1987_23_3_a15