@article{DE_1971_7_1_a1,
     author = {V. N. Vragov},
     title = {The first boundary value problem for certain strongly elliptic systems of equations that degenerate on the boundary},
     journal = {Differencialʹnye uravneni\^a},
     pages = {15--24},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_1_a1/}
}