@article{JRAM_1923__152_149520,
     author = {F. Burkhardt},
     title = {\"Uber eine {Verallgemeinerung} der {Tetraedergruppe.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {149--155},
     publisher = {mathdoc},
     volume = {152},
     year = {1923},
     zbl = {49.0085.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1923__152_149520/}
}