"Gorillas on Thin Ice". 15 de xaneiro de 2009. Arquivado dende o orixinal o 18 de maio de 2016. Consultado o 19 de maio de 2010.: "The Eastern Lowland Gorilla population in the DRC has plummeted dramatically over the last 10 years, with probably only about 5,000 of the formerly 17,000 animals remaining."
"Gorillas on Thin Ice". 15 de xaneiro de 2009. Arquivado dende o orixinal o 18 de maio de 2016. Consultado o 19 de maio de 2010.: "The Eastern Lowland Gorilla population in the DRC has plummeted dramatically over the last 10 years, with probably only about 5,000 of the formerly 17,000 animals remaining."