@article{bwmeta1.element.bwnjournal-article-aav7i4p399bwm,
author = {Rankin, R.},
title = {On the representation of a number as the sum of any number of squares, and in particular of twenty},
journal = {Acta Arithmetica},
volume = {7},
year = {1962},
pages = {399-407},
zbl = {0106.03804},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-aav7i4p399bwm}
}
Rankin, R. On the representation of a number as the sum of any number of squares, and in particular of twenty. Acta Arithmetica, Tome 7 (1962) pp. 399-407. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-aav7i4p399bwm/