Harris, Tara R. Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;
Harris, T. R., Fitch, W. T., Goldstein, L. M., & Fashing, P. J. (2006). Black and White Colobus Monkey (Colobus guereza) Roars as a Source of Both Honest and Exaggerated Information About Body Mass. Ethology, 112(9), 911-920. doi:10.1111/j.1439-0310.2006.01247.x.