@article{DE_1974_10_1_a7,
     author = {T. Sh. Kal'menov},
     title = {The {Darboux} problem for a certain degenerate equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {59--68},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_1_a7/}
}