V. J. Zacharias and A. K. Bhardwaj, “Observations on the Flying Squirrels <I>Petaurista petaurista philippensis</I> (Elliot) and <I>Petinomys fuscocapillus</I> (Jerdon) in Periyar Tiger Reserve and its Neighbourhood”, Indian Forester, vol. 123, no. 10, pp. 973–974, Oct. 1997.