Jaleel, Qahtan, and Saleh Radhi. “The Effect of Using the Circular Training and the Stations Techniques in Developing Some Physical Abilities and Basic Skills for the Goalkeepers of Football . From 15-16 Years”. Journal of Physical Education, vol. 20, no. 3, Sept. 2008, pp. 335-72, https://doi.org/10.37359/JOPE.V20(3)2008.795.