@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/}
}