T.  Barbour and Loveridge, A., ?A comparative study of the herpetological faunae of the Uluguru and Usambara Mountains, Tanganyika Territory with descriptions of new species?, Memoirs of the Museum of Comparative Zoology, vol. L, pp. 85-265, 1928.

A.  Schiøtz, ?The voices of some West African amphibians?, Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening, vol. 127, pp. 35-83, 1964.

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.

G. J.  Measey, Malonza, P. K., and Muchai, V., ?Amphibians of the Taita Hills / Amfibia wa milima ya Taita?, SANBI Biodiversity Series 12, 2009.

E. B.  Harper, Measey, G. J., Patrick, D. A., Menegon, M., and Vonesh, J. R., Field Guide to Amphibians of the Eastern Arc Mountains and Coastal Forests of Tanzania and Kenya. Nairobi, Kenya: Camerapix Publishers International, 2010, p. 320.