Zimkus, Breda M., and Joanna G. Larson. 2011. “Examination of the Molecular Relationships of Sand Frogs (Anura: Pyxicephalidae: Tomopterna) and Resurrection of Two Species from the Horn of Africa”. Zootaxa 2933 (1). Auckland, New Zealand:27-45. https://doi.org/10.11646/zootaxa.2933.1.2.