TY  - JOUR
AU  - J. Cassels
TI  - On the representation of rational functions as sums of squares
JO  - Acta Arithmetica
PY  - 1964
SP  - 79
EP  - 82
VL  - 9
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/aa-9-1-79-82/
DO  - 10.4064/aa-9-1-79-82
LA  - en
ID  - 10_4064_aa_9_1_79_82
ER  -