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@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/} }
L. A. Sakhnovich. A~hyperbolic sine-Gordon equation. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1991), pp. 54-63. http://geodesic.mathdoc.fr/item/IVM_1991_1_a12/