TY  - JOUR
AU  - Humphrey Fong
TI  - On invariant functions for positive operators
JO  - Colloquium Mathematicum
PY  - 1970
SP  - 75
EP  - 84
VL  - 22
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-22-1-75-84/
DO  - 10.4064/cm-22-1-75-84
LA  - en
ID  - 10_4064_cm_22_1_75_84
ER  -