@incollection{JEDP_1982____A9_0,
     author = {Wagschal, Claude},
     title = {Probl\`eme de {Cauchy} ramifi\'e \`a caract\'eristiques multiples de multiplicit\'e variable},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {9},
     pages = {1--6},
     publisher = {Ecole polytechnique},
     year = {1982},
     mrnumber = {84g:35005},
     language = {fr},
     url = {http://archive.numdam.org/item/JEDP_1982____A9_0/}
}