@article{ASENS_1896_3_13__S3_0,
     author = {Beudon, J.},
     title = {Sur les syst\`emes d'\'equations aux d\'eriv\'ees partielles dont les caract\'eristiques d\'ependent d'un nombre fini de param\`etres},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {3--51},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 13},
     year = {1896},
     doi = {10.24033/asens.437},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.437/}
}