Attributes / relations provided by
♦ 1Wood Janka Hardness Scale/Chart J W Morlan's Unique Wood Gifts
♦ 2Gorilla diet in the Lopé Reserve, Gabon: A nutritional analysis; M. Elizabeth Rogers, Fiona Maisels, Elizabeth A. Williamson, Michel Fernandez, and Caroline E.G. Tutin; Oecologia (1990) 84:326-339
♦ 3Forest elephant group composition, frugivory and coastal use in the Réserve de Faune du Petit Loango, Gabon, Bethan J. Morgan and P. C. Lee, African Journal of Ecology, Volume 45, Issue 4, pp. 519 - 526
♦ 4del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.