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@article{DE_1979_15_8_a14, author = {V. F. Ral'chenko}, title = {Qualitative properties of solutions of a mixed problem}, journal = {Differencialʹnye uravneni\^a}, pages = {1491--1502}, publisher = {mathdoc}, volume = {15}, number = {8}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1979_15_8_a14/} }
V. F. Ral'chenko. Qualitative properties of solutions of a mixed problem. Differencialʹnye uravneniâ, Tome 15 (1979) no. 8, pp. 1491-1502. http://geodesic.mathdoc.fr/item/DE_1979_15_8_a14/