@article{01570671, title = {Recursive determination of the enumerator for sums of three squares.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {23}, year = {2000}, pages = {529-532}, doi = {10.1155/S0161171200003902}, zbl = {1043.11037}, language = {en}, url = {http://dml.mathdoc.fr/item/01570671} }
Ewell, John A. Recursive determination of the enumerator for sums of three squares.. International Journal of Mathematics and Mathematical Sciences, Tome 23 (2000) pp. 529-532. doi : 10.1155/S0161171200003902. http://gdmltest.u-ga.fr/item/01570671/