@incollection{AST_1973__4__37_0,
     author = {Guivarc'h, Yves and Keane, Michael},
     title = {Un th\'eor\`eme de renouvellement pour les groupes nilpotents},
     booktitle = {S\'eminaire KGB sur les marches al\'eatoires},
     series = {Ast\'erisque},
     pages = {37--40},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {4},
     year = {1973},
     mrnumber = {478388},
     zbl = {0275.60013},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1973__4__37_0/}
}