Mahdi Salih Zaalan, “Comparison of Some Kinematic Variables of Approaching of Blocking Skill of Position 2 and 4 for the Two Hitters of the National Volleyball Team”, ms, vol. 18, no. 1, pp. 323–332, Mar. 2019, Accessed: May 14, 2025. [Online]. Available: https://www.jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1438