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@article{DE_1985_21_2_a6, author = {L. Sili}, title = {Intermediate stability in the first approximation under certain perturbations}, journal = {Differencialʹnye uravneni\^a}, pages = {240--245}, publisher = {mathdoc}, volume = {21}, number = {2}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1985_21_2_a6/} }
L. Sili. Intermediate stability in the first approximation under certain perturbations. Differencialʹnye uravneniâ, Tome 21 (1985) no. 2, pp. 240-245. http://geodesic.mathdoc.fr/item/DE_1985_21_2_a6/