@article{JRAM_1978__297_151945,
     author = {Udo Ott},
     title = {\"Uber zwei {Klassen} endlicher {S-Gruppen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--20},
     publisher = {mathdoc},
     volume = {297},
     year = {1978},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1978__297_151945/}
}