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@article{DE_1977_13_3_a14, author = {V. G. Romanov}, title = {On the problem of determining the right hand side of hyperbolic systems}, journal = {Differencialʹnye uravneni\^a}, pages = {509--515}, publisher = {mathdoc}, volume = {13}, number = {3}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1977_13_3_a14/} }
V. G. Romanov. On the problem of determining the right hand side of hyperbolic systems. Differencialʹnye uravneniâ, Tome 13 (1977) no. 3, pp. 509-515. http://geodesic.mathdoc.fr/item/DE_1977_13_3_a14/