@article{SM_1971_15_1_a6,
     author = {L. A. Bagirov},
     title = {Elliptic equations in unbounded domains},
     journal = {Sbornik. Mathematics},
     pages = {121--140},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_15_1_a6/}
}