@article{1028999907,
author = {Ellis, Homer G.},
title = {Existence of exact solutions of singular ordinary differential equations near their approximate solutions.},
journal = {Michigan Math. J.},
volume = {15},
number = {1},
year = {1968},
pages = { 75-80},
language = {en},
url = {http://dml.mathdoc.fr/item/1028999907}
}
Ellis, Homer G. Existence of exact solutions of singular ordinary differential equations near their approximate solutions.. Michigan Math. J., Tome 15 (1968) no. 1, pp. 75-80. http://gdmltest.u-ga.fr/item/1028999907/