Jaefar, Sadiq, and Shrooq Mahdy. “The Effect Of Load Frequency Control In Skill Exercises On Some Skill Abilities of Young Soccer Players”. Journal of Physical Education 31, no. 2 (June 28, 2019): 151–158. Accessed May 6, 2024. https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/922.