@article{SEDP_1975-1976____A13_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 = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:12},
     pages = {1--8},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1975-1976},
     zbl = {0343.35050},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1975-1976____A13_0/}
}