TY  - JOUR
AU  - Tam, Bit-Shun
TI  - A Simple proof of the Goldberg–Straus theorem on numerical radii
JO  - Glasgow mathematical journal
PY  - 1986
SP  - 139
EP  - 141
VL  - 28
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006455/
DO  - 10.1017/S0017089500006455
ID  - 10_1017_S0017089500006455
ER  -