"Bwindi Impenetrable National Park, Uganda". Protected Areas and World Heritage. United Nations Environment Programme, World Conservation Monitoring Centre. September 2003. Archived from the original on 2008-05-10. Retrieved 2008-07-08.
Robbins, M.; Sawyer, S. (2007). "Intergroup encounters in mountain gorillas of Bwindi Impenetrable National Park, Uganda". Behaviour. 144 (12): 1497–1519. doi:10.1163/156853907782512146. ISSN0005-7959.
"Bwindi Impenetrable National Park, Uganda". Protected Areas and World Heritage. United Nations Environment Programme, World Conservation Monitoring Centre. September 2003. Archived from the original on 2008-05-10. Retrieved 2008-07-08.
Robbins, M.; Sawyer, S. (2007). "Intergroup encounters in mountain gorillas of Bwindi Impenetrable National Park, Uganda". Behaviour. 144 (12): 1497–1519. doi:10.1163/156853907782512146. ISSN0005-7959.