"ADW:Pan troglodytes:information". Animal Diversity Web (University of Michigan Museum of Zoology). Consultado o 19 de agosto de 2013.
uncc.edu
personal.uncc.edu
In a talk presented at the Annual Meeting of the American Anthropological Association on November 20, 1999, Jonathan Marks stated: "Humans, chimpanzees, and gorillas are within two percentage points of one another genetically." "What It Really Means To Be 99% Chimpanzee"(en inglés). 10 de outubro de 2006. Arquivado dende o orixinal o 27 de marzo de 2013. Consultado o 19 de agosto de 2013.
web.archive.org
In a talk presented at the Annual Meeting of the American Anthropological Association on November 20, 1999, Jonathan Marks stated: "Humans, chimpanzees, and gorillas are within two percentage points of one another genetically." "What It Really Means To Be 99% Chimpanzee"(en inglés). 10 de outubro de 2006. Arquivado dende o orixinal o 27 de marzo de 2013. Consultado o 19 de agosto de 2013.