J. C.  Poynton, ?Amphibians of southeastern Tanzania, with special reference to Stephopaedes and Mertensophryne (Bufonidae)?, Bulletin of the Museum of Comparative Zoology, vol. 152, pp. 451-473, 1991.

A.  Channing and Howell, K., Amphibians of East Africa. Ithaca: Comstock Pub. Associates/Cornell University Press, 2006, p. 418 p., [24] p. of plates.

M.  Pickersgill, Frog search: results of expeditions to southern and eastern Africa from 1993-1999, 28th ed. Frankfurt am Main: Lanesboro, Minn.: Edition Chimaira; Zoo Book Sales, Serpent?s Tale [U.S. distributor], 2007, p. 574 p.