@article{1077469700,
author = {Hartman, Philip},
title = {The existence of large or small solutions of linear
differential equations},
journal = {Duke Math. J.},
volume = {28},
number = {1},
year = {1961},
pages = { 421-429},
language = {en},
url = {http://dml.mathdoc.fr/item/1077469700}
}
Hartman, Philip. The existence of large or small solutions of linear
differential equations. Duke Math. J., Tome 28 (1961) no. 1, pp. 421-429. http://gdmltest.u-ga.fr/item/1077469700/