@article{JRAM_1966__224_150767,
     author = {Karl Kronstein},
     title = {Characters and systems of subgroups.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {147--163},
     publisher = {mathdoc},
     volume = {224},
     year = {1966},
     zbl = {0244.20008},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1966__224_150767/}
}