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@article{DE_1987_23_1_a1, author = {Sh. A. Alimov}, title = {On smoothness of the solution of a degenerate problem with a directional derivative}, journal = {Differencialʹnye uravneni\^a}, pages = {10--22}, publisher = {mathdoc}, volume = {23}, number = {1}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1987_23_1_a1/} }
Sh. A. Alimov. On smoothness of the solution of a degenerate problem with a directional derivative. Differencialʹnye uravneniâ, Tome 23 (1987) no. 1, pp. 10-22. http://geodesic.mathdoc.fr/item/DE_1987_23_1_a1/