@article{bwmeta1.element.bwnjournal-article-aav14i4p357bwm,
author = {Hardy, John},
title = {Sums of two squares in a quadratic ring},
journal = {Acta Arithmetica},
volume = {13},
year = {1968},
pages = {357-369},
zbl = {0179.35301},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-aav14i4p357bwm}
}
Hardy, John. Sums of two squares in a quadratic ring. Acta Arithmetica, Tome 13 (1968) pp. 357-369. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-aav14i4p357bwm/