@incollection{JEDP_1982____A19_0, author = {Bernard Hanouzet and Jean-Luc Joly}, title = {Formes bilin\'eaires compatibles avec un syst\`eme}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {19}, pages = {1--5}, publisher = {\'Ecole polytechnique}, year = {1982}, language = {fr}, url = {https://proceedings.centre-mersenne.org/item/JEDP_1982____A19_0/} }