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@article{DE_1984_20_11_a27, author = {K. S. Matviychuk}, title = {On a comparison method for differential equations close to hyperbolic ones}, journal = {Differencialʹnye uravneni\^a}, pages = {2009--2011}, publisher = {mathdoc}, volume = {20}, number = {11}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1984_20_11_a27/} }
K. S. Matviychuk. On a comparison method for differential equations close to hyperbolic ones. Differencialʹnye uravneniâ, Tome 20 (1984) no. 11, pp. 2009-2011. http://geodesic.mathdoc.fr/item/DE_1984_20_11_a27/