Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_2006_42_8_a0, author = {Yu. N. Bibikov and M. V. Pirogov}, title = {Invariant tori of the {Duffing} equation}, journal = {Differencialʹnye uravneni\^a}, pages = {1011--1016}, publisher = {mathdoc}, volume = {42}, number = {8}, year = {2006}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_2006_42_8_a0/} }
Yu. N. Bibikov; M. V. Pirogov. Invariant tori of the Duffing equation. Differencialʹnye uravneniâ, Tome 42 (2006) no. 8, pp. 1011-1016. http://geodesic.mathdoc.fr/item/DE_2006_42_8_a0/