Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1980_16_12_a11, author = {S. M. Shugrin}, title = {Galilean systems of differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {2205--2218}, publisher = {mathdoc}, volume = {16}, number = {12}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1980_16_12_a11/} }
S. M. Shugrin. Galilean systems of differential equations. Differencialʹnye uravneniâ, Tome 16 (1980) no. 12, pp. 2205-2218. http://geodesic.mathdoc.fr/item/DE_1980_16_12_a11/