@article{1183512380,
author = {Kolchin, E. R.},
title = {Existence theorems connected with the Picard-Vessiot
theory of homogeneous linear
ordinary differential equations},
journal = {Bull. Amer. Math. Soc.},
volume = {54},
number = {12},
year = {1948},
pages = { 927-932},
language = {en},
url = {http://dml.mathdoc.fr/item/1183512380}
}
Kolchin, E. R. Existence theorems connected with the Picard-Vessiot
theory of homogeneous linear
ordinary differential equations. Bull. Amer. Math. Soc., Tome 54 (1948) no. 12, pp. 927-932. http://gdmltest.u-ga.fr/item/1183512380/