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@article{DAN_1989_308_1_a7, author = {M. M. Lavrent'ev}, title = {Evolution equations and the {Goursat} problem for a telegraph}, journal = {Doklady Akademii Nauk}, pages = {38--41}, publisher = {mathdoc}, volume = {308}, number = {1}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_1_a7/} }
M. M. Lavrent'ev. Evolution equations and the Goursat problem for a telegraph. Doklady Akademii Nauk, Tome 308 (1989) no. 1, pp. 38-41. http://geodesic.mathdoc.fr/item/DAN_1989_308_1_a7/