Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1978_14_7_a2, author = {M. V. Dolov}, title = {Darboux integrals in the case of a focus}, journal = {Differencialʹnye uravneni\^a}, pages = {1173--1178}, publisher = {mathdoc}, volume = {14}, number = {7}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1978_14_7_a2/} }
M. V. Dolov. Darboux integrals in the case of a focus. Differencialʹnye uravneniâ, Tome 14 (1978) no. 7, pp. 1173-1178. http://geodesic.mathdoc.fr/item/DE_1978_14_7_a2/