%0 Journal Article %A Weston, Kenneth %T ZA groups with a cyclic terminal upper central factor %J Portugaliae mathematica %D 1967 %P 185-191 %V 26 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115017/ %G en %F PORMA_1967__26_2_115017