Perissinotto, Renzo, Tommy G. Bornman, Paul-Pierre Steyn, Nelson A.F. Miranda, Rosemary A. Dorrington, Gwynneth F. Matcher, Nadine Strydom, and Nasreen Peer. “Tufa Stromatolite Ecosystems on the South African South Coast”. South African Journal of Science 110, no. 9/10 (September 22, 2014): 8. Accessed August 17, 2022. https://sajs.co.za/article/view/3975.