Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1971_7_5_a9, author = {V. V. Babikov}, title = {A certain class of second order nonlinear differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {883--891}, publisher = {mathdoc}, volume = {7}, number = {5}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_5_a9/} }
V. V. Babikov. A certain class of second order nonlinear differential equations. Differencialʹnye uravneniâ, Tome 7 (1971) no. 5, pp. 883-891. http://geodesic.mathdoc.fr/item/DE_1971_7_5_a9/