@article{10_1017_S0017089599000439,
     author = {Almazar, VittorioD. and Cossey, John},
     title = {Automorphisms fixing subnormalsubgroups of polycyclic groups},
     journal = {Glasgow mathematical journal},
     pages = {379--384},
     year = {1999},
     volume = {41},
     number = {3},
     doi = {10.1017/S0017089599000439},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089599000439/}
}