@incollection{JEDP_1982____A19_0,
     author = {Hanouzet, Bernard and Joly, Jean-Luc},
     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 = {http://archive.numdam.org/item/JEDP_1982____A19_0/}
}