Paijmans, Dane Matthew, and Ursula Bryson. “A Comparison of Measurements of Passerine Species and Subspecies in Namibia”. Afrotropical Bird Biology:<br /> Journal of the Natural History of African Birds 3 (June 9, 2023). Accessed May 19, 2024. https://journals.uct.ac.za/index.php/ABB/article/view/v3_5.