PARKER, V. Seasonal and medium term changes in observed densities of woodland birds in Groenkloof, Pretoria. Biodiversity Observations, [S. l.], p. 128–185, 2012. DOI: 10.15641/bo.156. Disponível em: https://journals.uct.ac.za/index.php/BO/article/view/156. Acesso em: 13 jan. 2026.