@article{DE_1986_22_11_a11,
     author = {P. I. Lizorkin and N. V. Miroshin},
     title = {Smoothness of the solution of the first boundary value problem for a second-order model degenerate elliptic differential operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1945--1951},
     publisher = {mathdoc},
     volume = {22},
     number = {11},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_11_a11/}
}