%0 Journal Article
%A P.L. Butzer
%A L. Hahn
%T A probabilistic approach to representation formulae for semigroups of operators with rates of convergence.
%J Semigroup forum
%D 1980
%P 257-272
%V 21
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1980__21_134451/
%F SF_1980__21_134451