@article{MZ_1977__154_172536,
     author = {Thomas R. Berger and John Cossey},
     title = {An {Example} in the {Theory} of {Normal} {Fitting} {Classes.}},
     journal = {Mathematische Zeitschrift},
     pages = {287--294},
     publisher = {mathdoc},
     volume = {154},
     year = {1977},
     zbl = {0336.20012},
     url = {http://geodesic.mathdoc.fr/item/MZ_1977__154_172536/}
}