@incollection{JEDP_1978____A12_0,
     author = {Guy M\'etivier},
     title = {Propri\'et\'e des it\'er\'es et ellipticit\'e},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {12},
     pages = {1--2},
     publisher = {\'Ecole polytechnique},
     year = {1978},
     mrnumber = {80f:35047},
     language = {fr},
     url = {https://proceedings.centre-mersenne.org/item/JEDP_1978____A12_0/}
}