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@article{DE_1968_4_6_a6, author = {A. P. Sadovskii}, title = {Stability in critical cases}, journal = {Differencialʹnye uravneni\^a}, pages = {1018--1021}, publisher = {mathdoc}, volume = {4}, number = {6}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_6_a6/} }
A. P. Sadovskii. Stability in critical cases. Differencialʹnye uravneniâ, Tome 4 (1968) no. 6, pp. 1018-1021. http://geodesic.mathdoc.fr/item/DE_1968_4_6_a6/