Abdul Karim Jassem, Maan. “The Effect of Skillful Exercises by Both Training Methods , The Repetition and Interval in Some Basic Skills of Youth Football Players”. Al-Rafidain Journal For Sport Sciences 20, no. 65 (August 1, 2014): 145–168. Accessed November 17, 2025. https://rsprs.uomosul.edu.iq/index.php/rsprs/article/view/50178.