@article{bwmeta1.element.bwnjournal-article-pmfv45i1p5bwm,
author = {T. Estermann},
title = {On the representations of a number as a sum of squares},
journal = {Prace Matematyczno-Fizyczne},
volume = {45},
year = {1937},
pages = {93-125},
zbl = {0020.10501},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-pmfv45i1p5bwm}
}
Estermann, T. On the representations of a number as a sum of squares. Prace Matematyczno-Fizyczne, Tome 45 (1937) pp. 93-125. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-pmfv45i1p5bwm/