@article{10_4064__27_1_65_73,
     author = {Jean Bourguignon},
     title = {Invariants int\'egraux fonctionnels pour des \'equations aux d\'eriv\'ees partielles d'origine g\'eom\'etrique},
     journal = {Banach Center Publications},
     pages = {65--73},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1992},
     doi = {10.4064/-27-1-65-73},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/-27-1-65-73/}
}