CONRADIE, W.; BRANCH, W. R.; TOLLEY, K. A. 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, Auckland, New Zealand, v. 3635, n. 3, p. 201–223, 2013. DOI: 10.11646/zootaxa.3635.3.1. Disponível em: https://mapress.com/zt/article/view/zootaxa.3635.3.1. Acesso em: 20 apr. 2025.