@misc{JDM_1980__5_144559,
     title = {XIII. {Die} stereographische {Projection.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {93--98},
     publisher = {mathdoc},
     volume = {5},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/JDM_1980__5_144559/}
}