@article{1183532230,
author = {Berger, C. A. and Coburn, L. A.},
title = {One-parameter semigroups of isometries},
journal = {Bull. Amer. Math. Soc.},
volume = {76},
number = {4},
year = {1970},
pages = { 1125-1129},
language = {en},
url = {http://dml.mathdoc.fr/item/1183532230}
}
Berger, C. A.; Coburn, L. A. One-parameter semigroups of isometries. Bull. Amer. Math. Soc., Tome 76 (1970) no. 4, pp. 1125-1129. http://gdmltest.u-ga.fr/item/1183532230/