@article{GDZPPN001264052, title = {Optimal properties of contraction semigroups in Banach spaces.}, journal = {Semigroup forum}, volume = {51}, year = {1995}, pages = {247-250}, zbl = {0827.47032}, url = {http://dml.mathdoc.fr/item/GDZPPN001264052} }
Baillon, J.B.; Guerre-Delabrière, S. Optimal properties of contraction semigroups in Banach spaces.. Semigroup forum, Tome 51 (1995) pp. 247-250. http://gdmltest.u-ga.fr/item/GDZPPN001264052/