UNDERHILL, L. G.; HAREBOTTLE, D. M.; BROOKS, M. Second Southern African Bird Atlas Project (SABAP2): Progress report to 6 December 2012. Biodiversity Observations, [S. l.], p. 243–250, 2012. Disponível em: https://journals.uct.ac.za/index.php/BO/article/view/171. Acesso em: 21 oct. 2021.