Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1982_18_5_a7, author = {N. A. Lukashevich}, title = {Third-order equations without fixed critical points}, journal = {Differencialʹnye uravneni\^a}, pages = {778--785}, publisher = {mathdoc}, volume = {18}, number = {5}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1982_18_5_a7/} }
N. A. Lukashevich. Third-order equations without fixed critical points. Differencialʹnye uravneniâ, Tome 18 (1982) no. 5, pp. 778-785. http://geodesic.mathdoc.fr/item/DE_1982_18_5_a7/