@article{1261415781,
author = {KATO, Tosio},
title = {On the perturbation theory of closed linear operators.},
journal = {J. Math. Soc. Japan},
volume = {4},
number = {3-4},
year = {1952},
pages = { 323-337},
language = {en},
url = {http://dml.mathdoc.fr/item/1261415781}
}
KATO, Tosio. On the perturbation theory of closed linear operators.. J. Math. Soc. Japan, Tome 4 (1952) no. 3-4, pp. 323-337. http://gdmltest.u-ga.fr/item/1261415781/