@article{CRMATH_2004__339_9_617_0,
     author = {Powers, Victoria and Reznick, Bruce and Scheiderer, Claus and Sottile, Frank},
     title = {A new approach to {Hilbert's} theorem on ternary quartics},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {617--620},
     publisher = {Elsevier},
     volume = {339},
     number = {9},
     year = {2004},
     doi = {10.1016/j.crma.2004.09.014},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.09.014/}
}