@article{DE_1989_25_3_a21,
     author = {S. K. Kydyraliev},
     title = {Increasing the smoothness of solutions of second-order degenerate elliptic equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {529--531},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_3_a21/}
}