خيوني. “Preparing Exercises According to Generalize the Motor Program and The Levels of Skills and Their Effects on Visual Motor Coordination for Football Goalkeepers of Ages 13 - 15 Years.”. Journal of Physical Education, Vol. 28, no. 4.1, May 2019, pp. 63-82, doi:10.37359/JOPE.V28(4.1)2016.432.