@article{bwmeta1.element.bwnjournal-article-doi-10_4064-aa109-2-7,
author = {James G. Huard and Kenneth S. Williams},
title = {Sums of twelve squares},
journal = {Acta Arithmetica},
volume = {108},
year = {2003},
pages = {195-204},
zbl = {1023.11018},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa109-2-7}
}
James G. Huard; Kenneth S. Williams. Sums of twelve squares. Acta Arithmetica, Tome 108 (2003) pp. 195-204. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-aa109-2-7/