@article{10_1017_S0017089500004584,
     author = {Brown, Kenneth A.},
     title = {Modules over polycyclic groups have many irreducible images},
     journal = {Glasgow mathematical journal},
     pages = {141--150},
     year = {1981},
     volume = {22},
     number = {2},
     doi = {10.1017/S0017089500004584},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004584/}
}