@article{MZ_1978__164_172783,
     author = {Helmut M\"aurer},
     title = {Perspektive {Involutionen} in der {Geometrie} der quadratischen {Polynome.}},
     journal = {Mathematische Zeitschrift},
     pages = {261--270},
     year = {1978},
     volume = {164},
     zbl = {0377.50012},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__164_172783/}
}