Fruth, B. , Benishay, J.M. , Bila-Isia, I. , Coxe, S. , Dupain, J. , Furuichi, T. , Hart, J. , Hart, T. , Hashimoto, C. , Hohmann, G. , Hurley, M. , Ilambu, O. , Mulavwa, M. , Ndunda, M. , Omasombo, V. , Reinartz, G. , Scherlis, J. , Steel, L. & Thompson, J. (2008). Pan paniscus. 2008 IUCN Red List of Threatened Species. IUCN 2008. Retrieved on 4 January 2009 Listed as Endangered (EN A4cd v3.1)
