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@article{DE_1968_4_4_a0, author = {B. P. Demidovich}, title = {The orbital stability of bounded solutions of an autonomous {system.~I,} {II}}, journal = {Differencialʹnye uravneni\^a}, pages = {575--588}, publisher = {mathdoc}, volume = {4}, number = {4}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_4_a0/} }
B. P. Demidovich. The orbital stability of bounded solutions of an autonomous system.~I, II. Differencialʹnye uravneniâ, Tome 4 (1968) no. 4, pp. 575-588. http://geodesic.mathdoc.fr/item/DE_1968_4_4_a0/