@article{DE_1984_20_1_a19,
     author = {S. Yakubov and U. \`Egamberdiev},
     title = {Some boundary value problems with an unknown boundary for mixed parabolic-hyperbolic equations of second and third orders},
     journal = {Differencialʹnye uravneni\^a},
     pages = {154--161},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_1_a19/}
}