@article{1102986270,
author = {Kelley, Al},
title = {Invariance for linear systems of ordinary differential equations.},
journal = {Pacific J. Math.},
volume = {27},
number = {3},
year = {1968},
pages = { 289-304},
language = {en},
url = {http://dml.mathdoc.fr/item/1102986270}
}
Kelley, Al. Invariance for linear systems of ordinary differential equations.. Pacific J. Math., Tome 27 (1968) no. 3, pp. 289-304. http://gdmltest.u-ga.fr/item/1102986270/