@article{CM_1973__27_2_159_0,
     author = {Colin de Verdi\`ere, Yves},
     title = {Spectre du laplacien et longueurs des g\'eod\'esiques p\'eriodiques. {II}},
     journal = {Compositio Mathematica},
     pages = {159--184},
     publisher = {Noordhoff International Publishing},
     volume = {27},
     number = {2},
     year = {1973},
     zbl = {0281.53036},
     language = {fr},
     url = {http://archive.numdam.org/item/CM_1973__27_2_159_0/}
}