@article{GDZPPN002182092, title = {Characters and systems of subgroups.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, volume = {222}, year = {1966}, pages = {147-163}, zbl = {0244.20008}, url = {http://dml.mathdoc.fr/item/GDZPPN002182092} }
Kronstein, Karl. Characters and systems of subgroups.. Journal für die reine und angewandte Mathematik, Tome 222 (1966) pp. 147-163. http://gdmltest.u-ga.fr/item/GDZPPN002182092/