@incollection{JEDP_1983____A6_0, author = {Liess, Otto and Rodino, Luigi}, title = {A general class of {Gevrey-type} pseudo differential operators}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {6}, pages = {1--8}, publisher = {Ecole polytechnique}, year = {1983}, zbl = {0516.35086}, language = {en}, url = {http://archive.numdam.org/item/JEDP_1983____A6_0/} }