du Toit, P J, P E Kruger, A Joubert, and J Lunsky. “Effects of Exercise on Visual Performance of Female Rugby Players”. African Journal for Physical Activity and Health Sciences 13, no. 3 (January 18, 2008): 267–273. Accessed September 20, 2026. https://www.ajol.info/index.php/ajpherd/article/view/24770.