@article{DE_1989_25_6_a13,
     author = {A. Sopuev and D. T. Dzhuraev},
     title = {Boundary value problems for a degenerate parabolic-hyperbolic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1009--1015},
     publisher = {mathdoc},
     volume = {25},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_6_a13/}
}