@article{GDZPPN002415348, title = {A Problem in the Theory of Normal Flitting Classes.}, journal = {Mathematische Zeitschrift}, volume = {142}, year = {1975}, pages = {99-110}, zbl = {0283.20016}, url = {http://dml.mathdoc.fr/item/GDZPPN002415348} }
Bryce, R.A.; Cossey, John. A Problem in the Theory of Normal Flitting Classes.. Mathematische Zeitschrift, Tome 142 (1975) pp. 99-110. http://gdmltest.u-ga.fr/item/GDZPPN002415348/