@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/}
}