@article{DE_1980_16_1_a10,
     author = {S. K. Kumykova},
     title = {A boundary value problem with shift for a hyperbolic equation that is degenerate inside the domain},
     journal = {Differencialʹnye uravneni\^a},
     pages = {93--104},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_1_a10/}
}