Crofoot, M.C., Lambert, T.D., Kays, R.W., Wikelski, M., 2010. Does Watching a Monkey Change its Behaviour? Quantifying Observer Effects in Habituated Wild Primates using Automated Radiotelemetry. Animal Behaviour 80, 475-480. doi:10.1016/j.anbehav.2010.06.006

Crofoot, M.C., Gilby, I.C., Wikelski, M., Kays, R.W., 2008. Interaction Location Outweighs the Competitive Advantage of Numerical Superiority in Cebus capucinus Intergroup Contests. Proceedings of the National Academy of Sciences 105, 577-581. doi:10.1073/pnas.0707749105