@article{JRAM_1980__315_152231,
     author = {Detlev Poguntke},
     title = {Symmetry and nonsymmetry for a class of exponential {Lie} groups.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {127--138},
     publisher = {mathdoc},
     volume = {315},
     year = {1980},
     zbl = {0419.22014},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__315_152231/}
}