@article{IVM_1991_1_a12,
     author = {L. A. Sakhnovich},
     title = {A~hyperbolic {sine-Gordon} equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {54--63},
     publisher = {mathdoc},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_1_a12/}
}