Abbas, Amar, and Monther Mahmoud. “The Effect of Using Flip Classroom On Performing Straddle and Squat Vaults In Men’s Artistic Gymnastics Vault”. Journal of Physical Education 31, no. 1 (March 28, 2019): 18–29. Accessed July 4, 2026. https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/810.