@article{1102992499,
author = {Kaashoek, M. A. and Lay, D. C.},
title = {On operators whose Fredholm set is the complex plane.},
journal = {Pacific J. Math.},
volume = {23},
number = {3},
year = {1967},
pages = { 275-278},
language = {en},
url = {http://dml.mathdoc.fr/item/1102992499}
}
Kaashoek, M. A.; Lay, D. C. On operators whose Fredholm set is the complex plane.. Pacific J. Math., Tome 23 (1967) no. 3, pp. 275-278. http://gdmltest.u-ga.fr/item/1102992499/