@article{JMPA_1866_2_11__103_0,
     author = {Liouville, J.},
     title = {Sur les deux formes $3x^2+5y^2+10z^2+10zt+10t^2$, $2x^2+2xy+3y^2+15z^2+15t^2$},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {103--104},
     publisher = {Gauthier-Villars},
     volume = {2e s{\'e}rie, 11},
     year = {1866},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1866_2_11__103_0/}
}