TY  - JOUR
AU  - Ewa Damek
TI  - Curvature of a semi-direct extension of a Heisenberg type nilpotent group
JO  - Colloquium Mathematicum
PY  - 1987
SP  - 249
EP  - 253
VL  - 53
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-53-2-249-253/
DO  - 10.4064/cm-53-2-249-253
LA  - en
ID  - 10_4064_cm_53_2_249_253
ER  -