Nagham Hatem Hameed, Haider Faiq Al-Shamaa, and Firas Haider. “Preparing Movement Exercises Using a Proposed Laser Device on the Heel of the Foot to Learn and Develop the Speed of Rotation and Accomplish to the Discus Throw for Youth U 20”. Modern Sport 23, no. 1 (March 30, 2024): 0123–0133. Accessed May 8, 2024. https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1266.