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