VILJOEN, K.S.; SKINNER, E.M.W.; LOUBSER, J.M. Petrology of the Postmasburg kimberlites. International Kimberlite Conference: Extended Abstracts, [S. l.], v. 6, n. 1, p. 653–655, 1995. DOI: 10.29173/ikc2001. Disponível em: https://journals.library.ualberta.ca/ikcabstracts.com/index.php/ikc/article/view/2001. Acesso em: 6 feb. 2025.