%0 Journal Article %A Rosenblatt, Joseph Max %T The number of extensions of an invariant mean %J Compositio Mathematica %D 1976 %P 147-159 %V 33 %N 2 %I Noordhoff International Publishing %U http://archive.numdam.org/item/CM_1976__33_2_147_0/ %G en %F CM_1976__33_2_147_0