Clans
Compositio Mathematica, Tome 17 (1965-1966), pp. 172-189. 
@article{CM_1965-1966__17__172_0,
     author = {Wyler, Oswald},
     title = {Clans},
     journal = {Compositio Mathematica},
     pages = {172--189},
     publisher = {Kraus Reprint},
     volume = {17},
     year = {1965-1966},
     mrnumber = {197368},
     zbl = {0146.02004},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1965-1966__17__172_0/}
}
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Wyler, Oswald. Clans. Compositio Mathematica, Tome 17 (1965-1966), pp. 172-189. http://archive.numdam.org/item/CM_1965-1966__17__172_0/

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