Sattar, Hasnaa, and Al-hamza Issa. “Some Kinematical Variables and Their Relationship With Position Two Blocking Accuracy by Pivot Volleyball Club Players in the Primer League”. Journal of Physical Education, vol. 30, no. 1, Mar. 2018, pp. 44-54, https://doi.org/10.37359/JOPE.V30(1)2018.318.