@article{JMPA_1863_2_8__239_0, author = {Liouville, J.}, title = {Sur la forme $3x^2+3y^2+4z^2+12t^2$}, journal = {Journal de Math\'ematiques Pures et Appliqu\'ees}, pages = {239--240}, publisher = {Gauthier-Villars}, volume = {2e s{\'e}rie, 8}, year = {1863}, language = {fr}, url = {http://archive.numdam.org/item/JMPA_1863_2_8__239_0/} }