@article{GDZPPN00242178X, title = {Two Theorems on Polycyclic Groups.}, journal = {Mathematische Zeitschrift}, volume = {162}, year = {1978}, pages = {185-188}, zbl = {0391.20026}, url = {http://dml.mathdoc.fr/item/GDZPPN00242178X} }
Segal, Daniel. Two Theorems on Polycyclic Groups.. Mathematische Zeitschrift, Tome 162 (1978) pp. 185-188. http://gdmltest.u-ga.fr/item/GDZPPN00242178X/