@article{SEDP_1975-1976____A22_0,
     author = {Alinhac, S.},
     title = {Param\'etrix pour un probl\`eme de {Cauchy} hyperbolique \`a multiplicit\'e variable},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:21},
     pages = {1--9},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1975-1976},
     mrnumber = {499764},
     zbl = {0338.58018},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1975-1976____A22_0/}
}