@incollection{JEDP_1983____A3_0, author = {Tr\`eves, Fran\c{c}ois}, title = {Sur l'exactitude des complexes diff\'erentiels de type de {Lewy}}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {3}, pages = {1--14}, publisher = {Ecole polytechnique}, year = {1983}, language = {fr}, url = {http://www.numdam.org/item/JEDP_1983____A3_0/} }