Calligeris, Theo, Theresa Burgess, and Mike Lambert. “The Incidence of Injuries and Exposure Time of Professional Football Club Players in the Premier Soccer League During Football Season”. South African Journal of Sports Medicine 27, no. 1 (March 15, 2015): 16–19. Accessed April 28, 2024. https://journals.assaf.org.za/index.php/sajsm/article/view/484.