@article{ASENS_1910_3_27__109_0,
     author = {Cartan, Elie},
     title = {Les syst\`emes de {Pfaff,} \`a cinq variables et les \'equations aux d\'eriv\'ees partielles du second ordre},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {109--192},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 27},
     year = {1910},
     doi = {10.24033/asens.618},
     mrnumber = {1509120},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/asens.618/}
}