@article{1250130642,
author = {Gehrmann, James E. and Sherman, Thomas L.},
title = {Asymptotic behavior of solutions and their derivatives for linear differential equations},
journal = {Rocky Mountain J. Math.},
volume = {5},
number = {4},
year = {1975},
pages = { 275-282},
language = {en},
url = {http://dml.mathdoc.fr/item/1250130642}
}
Gehrmann, James E.; Sherman, Thomas L. Asymptotic behavior of solutions and their derivatives for linear differential equations. Rocky Mountain J. Math., Tome 5 (1975) no. 4, pp. 275-282. http://gdmltest.u-ga.fr/item/1250130642/