@incollection{JEDP_1982____A12_0,
     author = {Matsuzawa, Tadato},
     title = {Op\'erateurs pseudo-diff\'erentiels et classes de {Gevrey}},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {12},
     pages = {1--6},
     year = {1982},
     publisher = {Ecole polytechnique},
     doi = {10.5802/jedp.254},
     zbl = {0489.35081},
     language = {fr},
     url = {https://www.numdam.org/articles/10.5802/jedp.254/}
}