Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1971_7_4_a4, author = {L. S. Lavrinovich}, title = {A second order dynamical system with a given particular integral}, journal = {Differencialʹnye uravneni\^a}, pages = {622--630}, publisher = {mathdoc}, volume = {7}, number = {4}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_4_a4/} }
L. S. Lavrinovich. A second order dynamical system with a given particular integral. Differencialʹnye uravneniâ, Tome 7 (1971) no. 4, pp. 622-630. http://geodesic.mathdoc.fr/item/DE_1971_7_4_a4/