Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1989_25_6_a24, author = {V. A. Lunkevich and K. S. Sibirskii}, title = {Quadratic zero-systems of differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {1056--1058}, publisher = {mathdoc}, volume = {25}, number = {6}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1989_25_6_a24/} }
V. A. Lunkevich; K. S. Sibirskii. Quadratic zero-systems of differential equations. Differencialʹnye uravneniâ, Tome 25 (1989) no. 6, pp. 1056-1058. http://geodesic.mathdoc.fr/item/DE_1989_25_6_a24/