@incollection{JEDP_1979____A5_0, author = {Schapira, Pierre}, title = {Conditions de positivit\'e dans une vari\'et\'e symplectique complexe. {Applications} \`a l'\'etude de l'hypoellipticit\'e analytique}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {5}, pages = {1--6}, publisher = {Ecole polytechnique}, year = {1979}, language = {fr}, url = {http://archive.numdam.org/item/JEDP_1979____A5_0/} }