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Bartick, Mike (Spring 2017). "Blackwater Diving". Alert Diver. Divers Alert Network. Archived from the original on 7 November 2019. Retrieved 7 November 2019.
"Diving Regulations 2009". Occupational Health and Safety Act 85 of 1993 – Regulations and Notices – Government Notice R41. Pretoria: Government Printer. Archived from the original on 4 November 2016. Retrieved 3 November 2016 – via Southern African Legal Information Institute.