@article{GDZPPN002408295, title = {Inversions in Locally Affine Circular Spaces. I.}, journal = {Mathematische Zeitschrift}, volume = {121}, year = {1971}, pages = {189-202}, zbl = {0204.20904}, url = {http://dml.mathdoc.fr/item/GDZPPN002408295} }
Buekenhout, Francis. Inversions in Locally Affine Circular Spaces. I.. Mathematische Zeitschrift, Tome 121 (1971) pp. 189-202. http://gdmltest.u-ga.fr/item/GDZPPN002408295/