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@article{DE_1992_28_1_a10, author = {E. A. Larionov}, title = {Differential equations of hyperbolic type}, journal = {Differencialʹnye uravneni\^a}, pages = {91--96}, publisher = {mathdoc}, volume = {28}, number = {1}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1992_28_1_a10/} }
E. A. Larionov. Differential equations of hyperbolic type. Differencialʹnye uravneniâ, Tome 28 (1992) no. 1, pp. 91-96. http://geodesic.mathdoc.fr/item/DE_1992_28_1_a10/