PEARCE, D. G.; SWART, J.; LEWIS-WILLIAMS, J. D.; LOMBARD, M. The Harris Matrix and rock art; explanation and the Howieson’s Poort. Southern African Humanities, [S. l.], v. 18, n. 2, p. 173–88, 2021. Disponível em: https://sahumanities.org/index.php/sah/article/view/252. Acesso em: 22 jun. 2021.