Thamer, Ahmed. “Analytical Comparative Study of Some Kinematic Variables Affecting the Distances of 200 M. Freestyle Race”. Journal of Physical Education 32, no. 3 (September 28, 2020): 107–113. Accessed July 1, 2026. https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1026.