Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1973_9_5_a19, author = {N. P. Erugin}, title = {The {Picard} method}, journal = {Differencialʹnye uravneni\^a}, pages = {947--950}, publisher = {mathdoc}, volume = {9}, number = {5}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_5_a19/} }
N. P. Erugin. The Picard method. Differencialʹnye uravneniâ, Tome 9 (1973) no. 5, pp. 947-950. http://geodesic.mathdoc.fr/item/DE_1973_9_5_a19/