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@article{DE_1975_11_10_a8, author = {A. V. Osipov}, title = {The hyperbolicity of a basic family for {Levinson's} equation}, journal = {Differencialʹnye uravneni\^a}, pages = {1795--1800}, publisher = {mathdoc}, volume = {11}, number = {10}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1975_11_10_a8/} }
A. V. Osipov. The hyperbolicity of a basic family for Levinson's equation. Differencialʹnye uravneniâ, Tome 11 (1975) no. 10, pp. 1795-1800. http://geodesic.mathdoc.fr/item/DE_1975_11_10_a8/