@article{PORMA_1967__26_2_115017,
     author = {Weston, Kenneth},
     title = {ZA groups with a cyclic terminal upper central factor},
     journal = {Portugaliae mathematica},
     pages = {185--191},
     year = {1967},
     volume = {26},
     number = {2},
     mrnumber = {0262350},
     zbl = {0174.05001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115017/}
}