@article{SMJ_1936-1937__4__A2_0,
     author = {Cartan, Henri},
     title = {Syst\`emes de {Pfaff}},
     journal = {S\'eminaire de Math\'ematiques dit de Julia},
     note = {talk:2},
     pages = {1--33},
     publisher = {\'Ecole Normale Sup\'erieure},
     volume = {4},
     year = {1936-1937},
     language = {fr},
     url = {http://www.numdam.org/item/SMJ_1936-1937__4__A2_0/}
}