@article{1255986389,
author = {Goldstein, Jerome A. and Nagy, Bela},
title = {An extremal property of contraction semigroups in Banach spaces},
journal = {Illinois J. Math.},
volume = {39},
number = {4},
year = {1995},
pages = { 441-449},
language = {en},
url = {http://dml.mathdoc.fr/item/1255986389}
}
Goldstein, Jerome A.; Nagy, Bela. An extremal property of contraction semigroups in Banach spaces. Illinois J. Math., Tome 39 (1995) no. 4, pp. 441-449. http://gdmltest.u-ga.fr/item/1255986389/