Waleed Samir Hadi Al-Ardi, and Mahmoud Al-Basyouni. “The Effectiveness of a Training Program Using a The Defensive Wall Device Multi-Tasking to Develop the Accuracy of the Direct Free Kick”. Modern Sport 18, no. 2 (June 30, 2019): 489–494. Accessed April 3, 2025. https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1620.