Ainsley, Jerome. “The SABAP2 ‘Four Degrees Blue’ Project: The Challenge to Obtain at Least 11 Checklists in 576 Pentads”. Biodiversity Observations 7 (July 15, 2016): 1–7. Accessed May 13, 2025. https://journals.uct.ac.za/index.php/BO/article/view/332.