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@article{DE_1970_6_3_a18, author = {Hoang Van Tao}, title = {On the generalization of a certain theorem of {N.} {N.} {Bogoljubov} on averaging}, journal = {Differencialʹnye uravneni\^a}, pages = {555--557}, publisher = {mathdoc}, volume = {6}, number = {3}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1970_6_3_a18/} }
Hoang Van Tao. On the generalization of a certain theorem of N. N. Bogoljubov on averaging. Differencialʹnye uravneniâ, Tome 6 (1970) no. 3, pp. 555-557. http://geodesic.mathdoc.fr/item/DE_1970_6_3_a18/