“Invariant and Preserving Transforms for Cross Ratio of 4-Points in a line on Desargues Affine Plane” (2024) Journal of Prime Research in Mathematics, 20(2), pp. 48 – 63. Available at: https://jprm.sms.edu.pk/index.php/jprm/article/view/231 (Accessed: 7 December 2025).