@article{JMPA_1904_5_10__85_0,
     author = {Buhl, A.},
     title = {Sur les \'equations lin\'eaires aux d\'eriv\'ees partielles et la th\'eorie des groupes continus},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {85--129},
     publisher = {Gauthier-Villars},
     volume = {5e s{\'e}rie, 10},
     year = {1904},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1904_5_10__85_0/}
}