@article{10_4064_cm_53_2_255_268, author = {Ewa Damek}, title = {The geometry of a semi-direct extension of a {Heisenberg} type nilpotent group}, journal = {Colloquium Mathematicum}, pages = {255--268}, publisher = {mathdoc}, volume = {53}, number = {2}, year = {1987}, doi = {10.4064/cm-53-2-255-268}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-53-2-255-268/} }