TY  - JOUR
AU  - Christer Borell
TI  - Positivity Improving Operators and Hypercontractivity.
JO  - Mathematische Zeitschrift
PY  - 1982
SP  - 225
EP  - 234
VL  - 180
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1982__180_173183/
ID  - MZ_1982__180_173183
ER  -