@article{1102912207, author = {Caradus, S. R.}, title = {Perturbation theory for generalized Fredholm operators.}, journal = {Pacific J. Math.}, volume = {55}, number = {2}, year = {1974}, pages = { 11-15}, language = {en}, url = {http://dml.mathdoc.fr/item/1102912207} }
Caradus, S. R. Perturbation theory for generalized Fredholm operators.. Pacific J. Math., Tome 55 (1974) no. 2, pp. 11-15. http://gdmltest.u-ga.fr/item/1102912207/