@article{ASENS_1971_4_4_2_311_0,
     author = {Revoy, Ph.},
     title = {Sur les deux premiers invariants d'une forme quadratique},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {311--319},
     publisher = {Elsevier},
     volume = {4e s{\'e}rie, 4},
     number = {2},
     year = {1971},
     doi = {10.24033/asens.1212},
     mrnumber = {44 #6735},
     zbl = {0231.15020},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.1212/}
}