1. Agostinelli, C., and U. Lund. 2017. R package 'circular': circular Statistics (version 0.4-93). https://r-forge.r-project.org/projects/circular/
2. Ahumada, J.A., J. Hurtado, and D. Lizcano. 2013. Monitoring the status and trends of tropical forest terrestrial vertebrate communities from camera trap data: a tool for conservation. PLoS ONE 8: e73707.
3. Bell, S., L. Tyrväinen, T. Sievänen, U. Pröbstl, and M. Simpson. 2007. Outdoor recreation and nature tourism: a European perspective. Living Reviews in Landscape Research 1: 1–46.
4. Blanc, R., M. Guillemain, J.-B. Mouronval, D. Desmonts, and H. Fritz. 2006. Effects of non-consumptive leisure disturbance to wildlife. Revue D’ecologie, Terre Et Vie, Société Nationale De Protection De La Nature 61: 117–133.
5. Burnham, K.P., and D.R. Anderson. 2002. Model selection and multi-model inference. A practical information–theoretic approach, 488. New York: Springer.