@incollection{JEDP_1979____A12_0,
     author = {Zuily, Claude},
     title = {Unicit\'e du probl\`eme de {Cauchy} pour une classe d'op\'erateurs diff\'erentiels \`a caract\'eristiques de multiplicit\'e constante},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {12},
     pages = {1--5},
     year = {1979},
     publisher = {Ecole polytechnique},
     doi = {10.5802/jedp.198},
     mrnumber = {83c:35003},
     zbl = {0409.35001},
     language = {fr},
     url = {https://www.numdam.org/articles/10.5802/jedp.198/}
}