@article{ASENS_1930_3_47__325_0,
     author = {Goursat, \'Etienne},
     title = {Sur un syst\`eme d'\'equations aux d\'eriv\'ees partielles},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {325--357},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 47},
     year = {1930},
     doi = {10.24033/asens.804},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.804/}
}