@article{ASENS_1898_3_15__229_0,
     author = {Beudon, Jules},
     title = {Sur des syst\`emes d'\'equations aux d\'eriv\'ees partielles analogues aux \'equations du premier ordre},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {229--242},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 15},
     year = {1898},
     doi = {10.24033/asens.456},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.456/}
}