Laith H. M. Al-Ossmi, and Nesreen Kurdy Al-Obaidy. “Measuring Curvature Method for the Exact Value of the Ellipse Perimeter”. Eurasian Journal of Physics,Chemistry and Mathematics 20 (July 24, 2023): 27–44. Accessed January 9, 2025. https://geniusjournals.org/index.php/ejpcm/article/view/4695.