%0 Journal Article %A Christian Berg %T On the potential operators associated with a semigroup %J Studia Mathematica %D 1974 %P 111-113 %V 51 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-51-2-111-113/ %R 10.4064/sm-51-2-111-113 %G en %F 10_4064_sm_51_2_111_113