AlBarki, Ammar M., and Ahmed M. Hamruni. “Preparation and Development of Transformation Systems Between Ovals: ”. Conference On Engineering Science and Technology, vol. 6, no. 5، مجلة الجامعة الأسمرية, Dec. 2021, pp. 185-73, https://conf.asmarya.edu.ly/index.php/cest2021/article/view/109.