@incollection{AST_1973__4__41_0,
     author = {Guivarc'h, Yves},
     title = {Extension d'un th\'eor\`eme de {Choquet-Deny} \`a une classe de groupes non ab\'eliens},
     booktitle = {S\'eminaire KGB sur les marches al\'eatoires},
     series = {Ast\'erisque},
     pages = {41--59},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {4},
     year = {1973},
     mrnumber = {488307},
     zbl = {0275.60014},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1973__4__41_0/}
}