@incollection{AST_1985__132__259_0,
     author = {Colin de Verdi\`ere, Yves},
     title = {Th\'eorie spectrale des surfaces de {Riemann} d'aire infinie},
     booktitle = {Colloque en l'honneur de Laurent Schwartz (Volume 2)},
     series = {Ast\'erisque},
     pages = {259--275},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {132},
     year = {1985},
     mrnumber = {816771},
     zbl = {0582.58030},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1985__132__259_0/}
}