@article{1077492256,
author = {Thomas, Joseph Miller},
title = {Orderly differential systems},
journal = {Duke Math. J.},
volume = {6},
number = {1},
year = {1940},
pages = { 249-290},
language = {en},
url = {http://dml.mathdoc.fr/item/1077492256}
}
Thomas, Joseph Miller. Orderly differential systems. Duke Math. J., Tome 6 (1940) no. 1, pp. 249-290. http://gdmltest.u-ga.fr/item/1077492256/