“Direct Estimation for Approximation by Bernstein Polynomial by Using Ditzian-Totik and Average in L Ja,h11 P < Oo Modulus of Smoothness”. Ibn AL-Haitham Journal For Pure and Applied Sciences 21, no. 3 (September 23, 2017): 149–158. Accessed July 16, 2024. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1417.