@article{GDZPPN001254480,
title = {A probabilistic approach to representation formulae for semigroups of operators with rates of convergence.},
journal = {Semigroup forum},
volume = {20},
year = {1980},
pages = {257-272},
zbl = {0452.60009},
url = {http://dml.mathdoc.fr/item/GDZPPN001254480}
}
Butzer, P.L.; Hahn, L. A probabilistic approach to representation formulae for semigroups of operators with rates of convergence.. Semigroup forum, Tome 20 (1980) pp. 257-272. http://gdmltest.u-ga.fr/item/GDZPPN001254480/