@article{1102723815,
author = {Li, Bing Ren},
title = {The perturbation theory for linear operators of discrete type.},
journal = {Pacific J. Math.},
volume = {109},
number = {2},
year = {1983},
pages = { 29-38},
language = {en},
url = {http://dml.mathdoc.fr/item/1102723815}
}
Li, Bing Ren. The perturbation theory for linear operators of discrete type.. Pacific J. Math., Tome 109 (1983) no. 2, pp. 29-38. http://gdmltest.u-ga.fr/item/1102723815/