@article{1103039281,
author = {Swanson, C. A.},
title = {Asymptotic perturbation series for characteristic value problems.},
journal = {Pacific J. Math.},
volume = {9},
number = {4},
year = {1959},
pages = { 591-608},
language = {en},
url = {http://dml.mathdoc.fr/item/1103039281}
}
Swanson, C. A. Asymptotic perturbation series for characteristic value problems.. Pacific J. Math., Tome 9 (1959) no. 4, pp. 591-608. http://gdmltest.u-ga.fr/item/1103039281/