@incollection{JEDP_1982____A22_0,
     author = {Trepeau, Jean-Marie},
     title = {Sur la r\'esolubilit\'e microlocale des op\'erateurs de type principal},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {22},
     pages = {1--10},
     publisher = {Ecole polytechnique},
     year = {1982},
     zbl = {0489.35082},
     mrnumber = {672289},
     language = {fr},
     url = {http://archive.numdam.org/item/JEDP_1982____A22_0/}
}