Thamr, Ahmed, and Waled Qusay. “Analytical Study Of Total Performance Time and 50m Legs Performance Time In All Types of Swimming Strokes For Advance Swimmers”. Journal of Physical Education 28, no. 3 (September 28, 2016): 193–210. Accessed May 2, 2024. https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1069.