@article{DE_1975_11_1_a5,
     author = {V. I. Evsin},
     title = {The solvability of the {Holmgren} problem for a certain degenerate elliptic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {38--46},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_1_a5/}
}