@article{DE_1976_12_3_a9,
     author = {B. A. Bubnov},
     title = {A mixed problem for certain parabolic-hyperbolic equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {494--501},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_3_a9/}
}