@article{10_4064_aa_2_2_177_196,
     author = {L. Dickson},
     title = {Universal forms $\sum a_i (x_i)^n$ and {Waring's} problem},
     journal = {Acta Arithmetica},
     pages = {177--196},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1936},
     doi = {10.4064/aa-2-2-177-196},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-2-2-177-196/}
}