TY  - JOUR
AU  - Marek Bożejko
TI  - Positive-definite kernels, length functions on groups and a noncommutative von Neumann inequality
JO  - Studia Mathematica
PY  - 1989
SP  - 107
EP  - 118
VL  - 95
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-95-2-107-118/
DO  - 10.4064/sm-95-2-107-118
LA  - en
ID  - 10_4064_sm_95_2_107_118
ER  -