Dutta, B. B. “Studies of the Ceylone Frogmouth, <I>Batrachostomus moniliger< I> Blyth from India, With the Description of a New Sub-Species from Western Ghats”. Records of the Zoological Survey of India, vol. 109, no. 2, June 2009, pp. 79-85, doi:10.26515/rzsi/v109/i2/2009/159009.