TY - JOUR AU - Heineken, Hermann TI - Nilpotent groups of class two that can appear as central quotient groups JO - Rendiconti del Seminario Matematico della Università di Padova PY - 1990 SP - 241 EP - 248 VL - 84 PB - Seminario Matematico of the University of Padua UR - http://www.numdam.org/item/RSMUP_1990__84__241_0/ LA - en ID - RSMUP_1990__84__241_0 ER -