@article{SEDP_1978-1979____A8_0,
     author = {Nosmas, J. C.},
     title = {Param\'etrix du probl\`eme de {Cauchy} pour une classe de syst\`emes hyperboliques \`a caract\'eristiques r\'eelles involutives de multiplicit\'e variable},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:8},
     pages = {1--9},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1978-1979},
     mrnumber = {557519},
     zbl = {0414.35051},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1978-1979____A8_0/}
}