@article{JMPA_1928_9_7__319_0,
     author = {Dickson, L. E.},
     title = {Quadratic {Functions} of {Forms,} {Sums} of whose {Values} give all {Positive} {Integers}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {319--336},
     publisher = {Gauthier-Villars},
     volume = {Ser. 9, 7},
     year = {1928},
     language = {en},
     url = {http://www.numdam.org/item/JMPA_1928_9_7__319_0/}
}