@article{1256051764,
author = {ITo, Takashi and Wong, Tin Kin},
title = {A continuous lower estimate for the distance between an operator and compact perturbations of normal operators},
journal = {Illinois J. Math.},
volume = {17},
number = {4},
year = {1973},
pages = { 337-345},
language = {en},
url = {http://dml.mathdoc.fr/item/1256051764}
}
ITo, Takashi; Wong, Tin Kin. A continuous lower estimate for the distance between an operator and compact perturbations of normal operators. Illinois J. Math., Tome 17 (1973) no. 4, pp. 337-345. http://gdmltest.u-ga.fr/item/1256051764/