TY  - JOUR
AU  - R. Rankin
TI  - On the representation of a number as the sum of any number of squares, and in particular of twenty
JO  - Acta Arithmetica
PY  - 1961
SP  - 399
EP  - 407
VL  - 7
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/aa-7-4-399-407/
DO  - 10.4064/aa-7-4-399-407
LA  - en
ID  - 10_4064_aa_7_4_399_407
ER  -