صادق أحمد حسن هيام. “Definition The Best Tests of the Muscular Endurance from Different Positions for the Males Abdomen Group Muscles in (15-16) Ages”. College of Basic Education Research Journal 3, no. 1 (January 1, 2007): 122–144. Accessed October 26, 2025. https://stats.uomosul.edu.iq/index.php/berj/article/view/39807.