Conradie W, Branch WR, Tolley KA. Fifty Shades of Grey: giving colour to the poorly known Angolan Ashy reed frog (Hyperoliidae: Hyperolius cinereus), with the description of a new species. Zootaxa [Internet]. 2013 Mar. 27 [cited 2025 Apr. 20];3635(3):201–223. Available from: https://mapress.com/zt/article/view/zootaxa.3635.3.1