Jayapal, Rajah, et al. “Identification of Bigmes and Their Indicator Taxa for Conservation Planning: A Case Study from Central Indian Birds”. Journal of the Bombay Natural History Society (JBNHS), vol. 108, no. 3, Dec. 2011, pp. 163-71, http://bnhsjournal.in/index.php/bnhs/article/view/156344.