Hill, Lee, Pantelis Nikolaidis, and Beat Knechtle. “Swimming During COVID-19: Operational Recommendations and Considerations for South African Swimming Venues”. South African Journal of Sports Medicine 32, no. 1 (November 12, 2020): 1–3. Accessed November 23, 2024. https://journals.assaf.org.za/index.php/sajsm/article/view/8993.