@article{1200777440,
author = {Akashi, Wilson Yoshihiro},
title = {On the perturbation theory for Fredholm operators},
journal = {Osaka J. Math.},
volume = {21},
number = {1},
year = {1984},
pages = { 603-612},
language = {en},
url = {http://dml.mathdoc.fr/item/1200777440}
}
Akashi, Wilson Yoshihiro. On the perturbation theory for Fredholm operators. Osaka J. Math., Tome 21 (1984) no. 1, pp. 603-612. http://gdmltest.u-ga.fr/item/1200777440/