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@article{DAN_1964_157_3_a5, author = {M. M. Lavrent'ev}, title = {On an inverse problem for the wave equation}, journal = {Doklady Akademii Nauk}, pages = {520--521}, publisher = {mathdoc}, volume = {157}, number = {3}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1964_157_3_a5/} }
M. M. Lavrent'ev. On an inverse problem for the wave equation. Doklady Akademii Nauk, Tome 157 (1964) no. 3, pp. 520-521. http://geodesic.mathdoc.fr/item/DAN_1964_157_3_a5/