@article{RCP25_1978__25__81_0,
     author = {Leray, Jean},
     title = {Chapitre {II} {Fonctions} lagrangiennes ; op\'erateurs diff\'erentiels lagrangiens},
     journal = {Les rencontres physiciens-math\'ematiciens de Strasbourg -RCP25},
     note = {talk:4},
     pages = {81--186},
     publisher = {Institut de Recherche Math\'ematique Avanc\'ee - Universit\'e Louis Pasteur},
     volume = {25},
     year = {1978},
     language = {fr},
     url = {http://www.numdam.org/item/RCP25_1978__25__81_0/}
}