Abbas A, Mahmoud M. The Effect of Using Flip Classroom On Performing Straddle and Squat Vaults In Men’s Artistic Gymnastics Vault. jope [Internet]. 2019 Mar. 28 [cited 2024 May 3];31(1):18-29. Available from: https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/810