@article{1102724787,
author = {Terlinden, D. M.},
title = {A spectral containment theorem analogous to the semigroup theory result $e^{t\sigma (A)}\subseteq \sigma (e^{tA})$.},
journal = {Pacific J. Math.},
volume = {103},
number = {2},
year = {1982},
pages = { 493-501},
language = {en},
url = {http://dml.mathdoc.fr/item/1102724787}
}
Terlinden, D. M. A spectral containment theorem analogous to the semigroup theory result $e^{t\sigma (A)}\subseteq \sigma (e^{tA})$.. Pacific J. Math., Tome 103 (1982) no. 2, pp. 493-501. http://gdmltest.u-ga.fr/item/1102724787/