@article{MZ_1983__183_173318,
     author = {Dieter Fl\"oge},
     title = {Zur {Struktur} der {PSL2} \"uber einigen imagin\"ar-quadratischen {Zahlringen.}},
     journal = {Mathematische Zeitschrift},
     pages = {255--280},
     publisher = {mathdoc},
     volume = {183},
     year = {1983},
     zbl = {0498.20036},
     url = {http://geodesic.mathdoc.fr/item/MZ_1983__183_173318/}
}