Waleed Samir Hadi Al-Ardi, and Mahmoud Al-Basyouni. 2019. “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 (2): 489-94. https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1620.