Dean, W.R.J., P. Barnard, and M.D. Anderson. “When to Stay, When to Go: Trade-Offs for Southern African Arid-Zone Birds in Times of Drought”. South African Journal of Science 105, no. 1/2 (December 11, 2009). Accessed December 4, 2024. https://sajs.co.za/article/view/10334.