%0 Journal Article %A A. Kh. Mamyan %T On some properties of the set of boundary value problems %J Sbornik. Mathematics %D 1984 %P 367-377 %V 49 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1984_49_2_a5/ %G en %F SM_1984_49_2_a5