@article{JRAM_1985__362_152771,
     author = {W. Plesken and W. Hanrath},
     title = {Group rings and irreducible representations of space groups.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {130--140},
     publisher = {mathdoc},
     volume = {362},
     year = {1985},
     zbl = {0565.20030},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1985__362_152771/}
}