M. P. GHIGLIERI, T. M. BUTYNSKI, T. T. STRUHSAKER, LYSA LELAND, S. J. WALLIS, P. WASER,
Bush pig (Potamochoerus porcus) polychromatism and ecology in Kibale Forest, Uganda African Journal of Ecology. ,vol. 20, pp. 231- 236 ,(1982) ,
10.1111/J.1365-2028.1982.TB00298.X