@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://archive.numdam.org/item/CM_1976__33_2_147_0/}
}