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@article{DAN_1977_237_2_a0, author = {V. M. Isakov}, title = {On the inverse problem of the potential for hyperbolic equations}, journal = {Doklady Akademii Nauk}, pages = {257--259}, publisher = {mathdoc}, volume = {237}, number = {2}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1977_237_2_a0/} }
V. M. Isakov. On the inverse problem of the potential for hyperbolic equations. Doklady Akademii Nauk, Tome 237 (1977) no. 2, pp. 257-259. http://geodesic.mathdoc.fr/item/DAN_1977_237_2_a0/