@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/