Khalil, Athear. “Momentum Contribution Percentage Study Of Some Body Parts On Movement Amount During Airborne Phase in Long Jumpers U20”. Journal of Physical Education 28, no. 3 (September 28, 2016): 514–528. Accessed July 3, 2026. https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1088.