@article{10_1017_S0017089500008260,
     author = {Cossey, John},
     title = {The {Wielandt} subgroup of a polycyclic group},
     journal = {Glasgow mathematical journal},
     pages = {231--234},
     year = {1991},
     volume = {33},
     number = {2},
     doi = {10.1017/S0017089500008260},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008260/}
}