@article{ASENS_1891_3_8__S3_0,
     author = {Bourlet, C.},
     title = {Sur les \'equations aux d\'eriv\'ees partielles simultan\'ees qui contiennent plusieurs fonctions inconnues},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {3--63},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 8},
     year = {1891},
     doi = {10.24033/asens.362},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.362/}
}