@article{bwmeta1.element.bwnjournal-article-smv61i1p18bwm,
author = {Jaroslav Zem\'anek},
title = {Spectral radius characterization of commutativity in Banach algebras},
journal = {Studia Mathematica},
volume = {60},
year = {1977},
pages = {257-268},
zbl = {0321.46037},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-smv61i1p18bwm}
}
Zemánek, Jaroslav. Spectral radius characterization of commutativity in Banach algebras. Studia Mathematica, Tome 60 (1977) pp. 257-268. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-smv61i1p18bwm/