@article{SEDP_1984-1985____A1_0,
     author = {Taira, K.},
     title = {Le principe du maximum et l'hypoellipticit\'e globale},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:1},
     pages = {1--10},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1984-1985},
     mrnumber = {819767},
     zbl = {0582.35023},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1984-1985____A1_0/}
}