@incollection{XUPS_2004____25_0,
     author = {Yves Colin de Verdi\`ere},
     title = {Sur le spectre des op\'erateurs {de~type~Schr\"odinger} sur les graphes},
     booktitle = {Graphes},
     series = {Journ\'ees math\'ematiques X-UPS},
     pages = {25--54},
     publisher = {Les \'Editions de l{\textquoteright}\'Ecole polytechnique},
     year = {2004},
     doi = {10.5802/xups.2004-02},
     zbl = {1111.47030},
     language = {fr},
     url = {https://proceedings.centre-mersenne.org/articles/10.5802/xups.2004-02/}
}