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@article{DE_1979_15_8_a2, author = {Ya. S. Baris}, title = {The reduction principle for a singularly perturbed system}, journal = {Differencialʹnye uravneni\^a}, pages = {1390--1394}, publisher = {mathdoc}, volume = {15}, number = {8}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1979_15_8_a2/} }
Ya. S. Baris. The reduction principle for a singularly perturbed system. Differencialʹnye uravneniâ, Tome 15 (1979) no. 8, pp. 1390-1394. http://geodesic.mathdoc.fr/item/DE_1979_15_8_a2/