Suleyman Ciftci and Atilla Akpinar and Basri Celik, Some Collineations Preserving Cross-Ratio in some Moufang-Klingenberg Planes. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. November 2009, vol. 35(11). 1057 - 1062 [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/11785.