%0 Journal Article
%A N. Sauer
%A J.E. Singleton
%T Evolution operators in empathy with a semi-group.
%J Semigroup forum
%D 1989
%P 85-94
%V 39
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1989__39_2_134977/
%F SF_1989__39_2_134977