Hameed Khdhayer, Firas, فراس, Khazal Ali Ameen, and خزعل. “ Callus”. Journal of Education and Science (JES) 26, no. 4 (October 1, 2013): 74–88. Accessed August 4, 2025. https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17589.