@article{DAN_1964_156_1_a5,
     author = {A. Nar\v{c}aev},
     title = {The first boundary-value problem for elliptic equations which degenerate at the boundary},
     journal = {Doklady Akademii Nauk},
     pages = {28--31},
     publisher = {mathdoc},
     volume = {156},
     number = {1},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_156_1_a5/}
}