TY  - JOUR
AU  - Marek Ptak
TI  - Unitary dilations of multi-parameter semigroups of operators
JO  - Annales Polonici Mathematici
PY  - 1985
SP  - 237
EP  - 243
VL  - 45
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-45-3-237-243/
DO  - 10.4064/ap-45-3-237-243
LA  - en
ID  - 10_4064_ap_45_3_237_243
ER  -