@article{SM_1984_49_2_a5,
     author = {A. Kh. Mamyan},
     title = {On some properties of the set of boundary value problems},
     journal = {Sbornik. Mathematics},
     pages = {367--377},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1984_49_2_a5/}
}