@article{TSG_1994-1995__13__9_0,
     author = {Colin de Verdi\`ere, Yves},
     title = {Th\'eor\`emes de {Courant} et de {Cheng} combinatoires},
     journal = {S\'eminaire de th\'eorie spectrale et g\'eom\'etrie},
     pages = {9--13},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {13},
     year = {1994-1995},
     mrnumber = {1715952},
     zbl = {0910.05043},
     language = {fr},
     url = {http://www.numdam.org/item/TSG_1994-1995__13__9_0/}
}