@article{JMPA_1890_4_6__5_0, author = {Pepin}, title = {Sur quelques formes quadratiques quaternaires}, journal = {Journal de Math\'ematiques Pures et Appliqu\'ees}, pages = {5--67}, publisher = {Gauthier-Villars}, volume = {4e s{\'e}rie, 6}, year = {1890}, language = {fr}, url = {http://www.numdam.org/item/JMPA_1890_4_6__5_0/} }