• [Wiki] http://en.wikipedia.org/wiki/Hexaprotodon_liberiensis.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Hexaprotodon_liberiensis.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [LangSchm1982] Langdon, D. and Schmidt, K. (1982). Hand-rearing a pygmy hippopotamus Choeropsis liberiensis at Melbourne Zoo. Int. Zoo Yb., 22:268--269. doi:10.1111/j.1748-1090.1982.tb02048.x.