Wessels, André. “Duikbote in Die Suid-Afrikaanse Vloot: Die Eerste Fase, 1970-2003. ’n Kort Historiese Evaluering (1): Agtergrond”. Southern Journal for Contemporary History 30, no. 2 (June 30, 2005): 180–194. Accessed May 19, 2024. https://journals.ufs.ac.za/index.php/jch/article/view/470.