@article{TSG_1993-1994__12__51_0,
     author = {Colin de Verdi\`ere, Yves},
     title = {Le trou spectral des graphes et leurs propri\'et\'es d'expansion},
     journal = {S\'eminaire de th\'eorie spectrale et g\'eom\'etrie},
     pages = {51--68},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {12},
     year = {1993-1994},
     zbl = {0905.05055},
     language = {fr},
     url = {http://www.numdam.org/item/TSG_1993-1994__12__51_0/}
}