@article{ASENS_1976_4_9_4_539_0,
     author = {Colin de Verdi\`ere, Y. and Frisch, M.},
     title = {R\'egularit\'e lipschitzienne et solutions de l'\'equation des ondes sur une vari\'et\'e riemannienne compacte},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {539--565},
     publisher = {Elsevier},
     volume = {4e s{\'e}rie, 9},
     number = {4},
     year = {1976},
     doi = {10.24033/asens.1318},
     mrnumber = {55 #6491},
     zbl = {0359.35042},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/asens.1318/}
}