حسن عثمان فريدون. 2007. “The Study of Some Kinematics Variables and Its Relation to Hijump Performance by Using Fosbury Flop MethodFarydoon H. Authman”. College of Basic Education Research Journal 3 (1):223-35. https://stats.uomosul.edu.iq/index.php/berj/article/view/39813.