@article{MZ_1975__141_172159,
     author = {R.A. Bryce and John Cossey},
     title = {A {Problem} in the {Theory} of {Normal} {Flitting} {Classes.}},
     journal = {Mathematische Zeitschrift},
     pages = {99--110},
     publisher = {mathdoc},
     volume = {141},
     year = {1975},
     zbl = {0283.20016},
     url = {http://geodesic.mathdoc.fr/item/MZ_1975__141_172159/}
}