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@article{DAN_1966_166_3_a7, author = {A. M. Nakhushev}, title = {On a problem of mixed type for the equation $y(y-1)u_{xx}+u_{yy}=0$}, journal = {Doklady Akademii Nauk}, pages = {536--539}, publisher = {mathdoc}, volume = {166}, number = {3}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1966_166_3_a7/} }
A. M. Nakhushev. On a problem of mixed type for the equation $y(y-1)u_{xx}+u_{yy}=0$. Doklady Akademii Nauk, Tome 166 (1966) no. 3, pp. 536-539. http://geodesic.mathdoc.fr/item/DAN_1966_166_3_a7/