@incollection{JEDP_1977____66_0,
     author = {Fitouhi, Ahmed},
     title = {Fonction z\^eta {d'Epstein} pour un op\'erateur elliptique qui d\'eg\'en\`ere dans la direction normale},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     pages = {66--80},
     publisher = {Ecole polytechnique},
     year = {1977},
     mrnumber = {80g:58048},
     language = {fr},
     url = {http://www.numdam.org/item/JEDP_1977____66_0/}
}