TY  - JOUR
AU  - Phillips, Ralph S.
TI  - Semi-groups of positive contraction operators
JO  - Czechoslovak Mathematical Journal
PY  - 1962
SP  - 294
EP  - 313
VL  - 12
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1962.100517/
DO  - 10.21136/CMJ.1962.100517
LA  - en
ID  - 10_21136_CMJ_1962_100517
ER  -