@incollection{SB_1996-1997__39__247_0,
     author = {Valette, Alain},
     title = {Graphes de {Ramanujan} et applications},
     booktitle = {S\'eminaire Bourbaki : volume 1996/97, expos\'es 820-834},
     series = {Ast\'erisque},
     note = {talk:829},
     pages = {247--276},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {245},
     year = {1997},
     mrnumber = {1627114},
     zbl = {0929.05042},
     language = {fr},
     url = {http://www.numdam.org/item/SB_1996-1997__39__247_0/}
}