@article{MZ_1972__128_171807,
     author = {Forrest A. Richen},
     title = {Groups with a {Steinberg} {Character.}},
     journal = {Mathematische Zeitschrift},
     pages = {297--304},
     publisher = {mathdoc},
     volume = {128},
     year = {1972},
     zbl = {0232.20011},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__128_171807/}
}