1. Bergendal, D.Bihang K. Svensk Vet. Akad. Handl., 1889, Bd.14.
2. Bland SuttonTrans. Path. Soc., 1889.
3. Boulenger, G. A.Fauna of British India : Reptilia and Batrachia, London, 1890, 439–441; 449–450.
4. Boulenger, G. A.Rec. Ind. Mus., 1920,20, 5–9, and 17–20.
5. Ecker, A., and Haslam, G.The Anatomy of the Frog, Oxford, 1889.