Walker, E.P.; Nowak, R.M. 1991. Mammals of the world, 5th edition, vol. 2. Baltimore & London, John Hopkins Press: pp. 1303-1304,1322-1333, 11 plates, 1 fig.
Walker, E.P. 1964. Mammals of the world. Baltimore, John Hopkins Press. vol. 2, pp. i-viii, 647-1500.






