@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}, doi = {10.5802/jedp.180}, mrnumber = {80f:35047}, language = {fr}, url = {https://proceedings.centre-mersenne.org/articles/10.5802/jedp.180/} }
Guy Métivier. Propriété des itérés et ellipticité. Journées équations aux dérivées partielles (1978), article no. 12, 2 p. doi : 10.5802/jedp.180. https://proceedings.centre-mersenne.org/articles/10.5802/jedp.180/