@article{1183492342,
author = {Dickson, L. E.},
title = {All positive integers are sums of values of a quadratic function of $x$},
journal = {Bull. Amer. Math. Soc.},
volume = {33},
number = {6},
year = {1927},
pages = { 713-720},
language = {en},
url = {http://dml.mathdoc.fr/item/1183492342}
}
Dickson, L. E. All positive integers are sums of values of a quadratic function of $x$. Bull. Amer. Math. Soc., Tome 33 (1927) no. 6, pp. 713-720. http://gdmltest.u-ga.fr/item/1183492342/