%0 Journal Article %A A. L. Skubachevskii %T Elliptic problems with nonlocal conditions near the boundary %J Sbornik. Mathematics %D 1987 %P 293-316 %V 57 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1987_57_1_a18/ %G en %F SM_1987_57_1_a18