Ismail, Taher, and Hind Saleh. “Representation of Standard Liebchtz Functions under a Microscope”. Journal of Education and Science (JES) 25, no. 1 (March 1, 2012): 120–127. Accessed August 6, 2025. https://ojs.uomosul.edu.iq/index.php/edusj/article/view/23701.