Oudh, M. T., and Y. A. B. Daiykh. “The Vertical and Horizontal Dimensions of the Base of the Fulcrum in the Stage of Advancement for the Performance of Highest Spike in Volleyball and Its Relationship to Some Biomechanical Variables”. International Journal of Health Sciences, vol. 6, no. S9, Sept. 2022, pp. 1633-41, doi:10.53730/ijhs.v6nS9.12633.