@article{01208018,
title = {Pappus' theorem for ring-geometries.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {39},
year = {1998},
pages = {461-466},
zbl = {0918.51002},
language = {en},
url = {http://dml.mathdoc.fr/item/01208018}
}
Pfeiffer, Thorsten. Pappus' theorem for ring-geometries.. Beiträge zur Algebra und Geometrie, Tome 39 (1998) pp. 461-466. http://gdmltest.u-ga.fr/item/01208018/