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@article{CM_1976__33_2_147_0, author = {Rosenblatt, Joseph Max}, title = {The number of extensions of an invariant mean}, journal = {Compositio Mathematica}, pages = {147--159}, publisher = {Noordhoff International Publishing}, volume = {33}, number = {2}, year = {1976}, mrnumber = {435729}, zbl = {0335.43001}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1976__33_2_147_0/} }
Rosenblatt, Joseph Max. The number of extensions of an invariant mean. Compositio Mathematica, Tome 33 (1976) no. 2, pp. 147-159. http://geodesic.mathdoc.fr/item/CM_1976__33_2_147_0/