@article{700619,
title = {Fredholm points of compactly perturbed bounded linear operators},
booktitle = {General topology and its relations to modern analysis and algebra IV},
series = {GDML\_Books},
publisher = {Society of Czechoslovak Mathematicians and Physicist},
address = {Praha},
year = {1977},
pages = {[268]-275},
mrnumber = {MR0512712},
zbl = {0385.47004},
url = {http://dml.mathdoc.fr/item/700619}
}
Marek, I. Fredholm points of compactly perturbed bounded linear operators, dans General topology and its relations to modern analysis and algebra IV, GDML_Books, (1977), pp. [268]-275. http://gdmltest.u-ga.fr/item/700619/