Walsh, Peter D. Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;
Devos, C., Walsh, P. D., Arnhem, E., & Huynen, M.-C. (2008). Monitoring population decline: can transect surveys detect the impact of the Ebola virus on apes? Oryx, 42(3), 367-374. doi:10.1017/S0030605308000161.