Asleawa, Wesam, و Sabreen Shihab. "The Effect of Group Exercises Combined With Repetitive Training Methods on Developing Speed Endurance in under-21 Football Players". Journal of Physical Education 37, no. 4 (ديسمبر 28, 2025): 1447–1460. تاريخ الوصول يناير 3, 2026. https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/2386.