Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1965_1_2_a5, author = {L. A. Cherkas}, title = {On complex cycles for a certain differential equation}, journal = {Differencialʹnye uravneni\^a}, pages = {182--186}, publisher = {mathdoc}, volume = {1}, number = {2}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1965_1_2_a5/} }
L. A. Cherkas. On complex cycles for a certain differential equation. Differencialʹnye uravneniâ, Tome 1 (1965) no. 2, pp. 182-186. http://geodesic.mathdoc.fr/item/DE_1965_1_2_a5/