@article{DE_1992_28_1_a21,
     author = {M. A. Sadybekov and G. D. Toyzhanova},
     title = {Spectral properties of a class of boundary value problems for a parabolic-hyperbolic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {176--179},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_1_a21/}
}