Suhad Ibrahim Hamdan. “The Effect of Anaerobic Exercises With a Critical Speed Index for the Effectiveness of 200m and Some Physical and Functional Abilities of the Class (46 T, T47) in the Second Special Preparation Stage”. Modern Sport, vol. 18, no. 4, Dec. 2019, pp. 471-8, https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1510.