@article{SEDP_1973-1974____A13_0,
     author = {Colin de Verdi\`ere, Y.},
     title = {Spectre du laplacien et longueurs des g\'eod\'esiques ferm\'ees},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:14},
     pages = {1--12},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1973-1974},
     mrnumber = {397804},
     zbl = {0291.53020},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1973-1974____A13_0/}
}