%0 Journal Article %A Rupert Lasser %A Josef Obermaier %T Strongly invariant means on commutative hypergroups %J Colloquium Mathematicum %D 2012 %P 119-131 %V 129 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm129-1-9/ %R 10.4064/cm129-1-9 %G en %F 10_4064_cm129_1_9