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@article{DE_1978_14_12_a5, author = {G. S. Krechetov}, title = {The stability of a perturbed system in a critical case}, journal = {Differencialʹnye uravneni\^a}, pages = {2153--2157}, publisher = {mathdoc}, volume = {14}, number = {12}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1978_14_12_a5/} }
G. S. Krechetov. The stability of a perturbed system in a critical case. Differencialʹnye uravneniâ, Tome 14 (1978) no. 12, pp. 2153-2157. http://geodesic.mathdoc.fr/item/DE_1978_14_12_a5/