Samir Bhaya, Eman, and Halgwrd Mohammed Darwesh. “Coconvex Polynomial Approximation”. Journal of Al-Qadisiyah for Computer Science and Mathematics 1, no. 1 (August 27, 2017): 42–57. Accessed December 21, 2024. https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/166.