Author(s): Butynski, T.M., Atickem, A. & De Jong, Y.A. Date: 2013 Registered: In: The Mammals of Africa - Volume II: Primates (eds. Butynski, T.M., Kingdon, J. & Kalina, J.). Bloomsbury Publishers, London. Pp. 287-290.
Author(s): Svensson, M., Bearder, S., Perkin, A. De Jong, Y. & Butynski, T. Date: 2012 Registered: Poster Presentation, Nocturnal Primate Research Group, Oxford Brookes University, Oxford, UK.