@article{1183509729,
author = {Dunford, Nelson and Segal, I. E.},
title = {Semi-groups of operators and the Weierstrass theorem},
journal = {Bull. Amer. Math. Soc.},
volume = {52},
number = {12},
year = {1946},
pages = { 911-914},
language = {en},
url = {http://dml.mathdoc.fr/item/1183509729}
}
Dunford, Nelson; Segal, I. E. Semi-groups of operators and the Weierstrass theorem. Bull. Amer. Math. Soc., Tome 52 (1946) no. 12, pp. 911-914. http://gdmltest.u-ga.fr/item/1183509729/