Abel, Nico, Catharina Cornelia Grant, and Dina C Janse van Rensburg. “Investigation of the Knowledge of South African High School Rugby Coaches on Concussion and the Return-to-Play Protocol”. South African Journal of Sports Medicine 34, no. 1 (August 24, 2022). Accessed April 7, 2025. https://journals.assaf.org.za/index.php/sajsm/article/view/12255.