@article{DE_1989_25_9_a23,
     author = {Kh. K. Zhemukhov},
     title = {A boundary value problem with a shift for a fourth-order degenerate quasilinear hyperbolic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1619--1622},
     publisher = {mathdoc},
     volume = {25},
     number = {9},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_9_a23/}
}