@article{DE_1977_13_7_a10,
     author = {T. Sh. Kal'menov and M. Otelbaev},
     title = {The smoothness of the solutions of a class of degenerate elliptic equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1244--1255},
     publisher = {mathdoc},
     volume = {13},
     number = {7},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_7_a10/}
}