@article{JMPA_1916_7_2__253_0,
     author = {Jordan, Camille},
     title = {Sur les groupes lin\'eaires $( \mathrm{mod} p )$ \`a invariant quadratique},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {253--280},
     publisher = {Gauthier-Villars},
     volume = {7e s{\'e}rie, 2},
     year = {1916},
     language = {fr},
     url = {http://archive.numdam.org/item/JMPA_1916_7_2__253_0/}
}