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@article{DAN_1974_219_4_a0, author = {R. M. Garipov}, title = {A hyperbolic boundary-value problem for the wave equation}, journal = {Doklady Akademii Nauk}, pages = {777--780}, publisher = {mathdoc}, volume = {219}, number = {4}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1974_219_4_a0/} }
R. M. Garipov. A hyperbolic boundary-value problem for the wave equation. Doklady Akademii Nauk, Tome 219 (1974) no. 4, pp. 777-780. http://geodesic.mathdoc.fr/item/DAN_1974_219_4_a0/