@article{1077492789,
author = {Niven, Ivan},
title = {Sums of $n$ -th powers of quadratic integers},
journal = {Duke Math. J.},
volume = {8},
number = {1},
year = {1941},
pages = { 441-451},
language = {en},
url = {http://dml.mathdoc.fr/item/1077492789}
}
Niven, Ivan. Sums of $n$ -th powers of quadratic integers. Duke Math. J., Tome 8 (1941) no. 1, pp. 441-451. http://gdmltest.u-ga.fr/item/1077492789/