Klopper, R.R., and N.R. Crouch. “Recircumscription and Distribution of Elements of the ‘Ceterach cordatum’ Complex (Asplenium: Aspleniaceae) in Southern Africa”. African Biodiversity & Conservation 42, no. 1 (December 12, 2012). Accessed May 2, 2026. https://mail.abcjournal.org/index.php/abc/article/view/256.