طاهر الديوان واثق ثامر, and زعون الخزرجي ايمان عبد الامير. “The Effect of Fartlik And Hill Style (Consequence & Intermitted) Using Treadmill For Developing Leg Muscular Strength and 400m Running Achievement In Physically Disabled (46 – 47)”. Journal of Physical Education 31, no. 3 (January 31, 2020): 258–266. Accessed November 29, 2021. https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/882.