@article{SEDP_1984-1985____A9_0,
     author = {Haraux, A.},
     title = {Propri\'et\'es d'oscillation des solutions de l'\'equation des ondes avec conditions de {Dirichlet} au bord},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:9},
     pages = {1--13},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1984-1985},
     zbl = {0581.35055},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1984-1985____A9_0/}
}