== Références principales ==
* Lovett, J.C., Ruffo, C.K., Gereau, R.E. & Taplin, J.R.D., 2006. Field guide to the moist forest trees of Tanzania. [Internet] Centre for Ecology Law and Policy, Environment Department, University of York, York, United Kingdom. http://celp.org.uk/ projects/ tzforeco/. April 2006.
* Thulin, M., 1999. Sterculiaceae. In: Thulin, M. (Editor). Flora of Somalia. Volume 2. Angiospermae (Tiliaceae-Apiaceae). Royal Botanic Gardens, Kew, Richmond, United Kingdom. pp. 21–37.
* Cheek, M., 2002. A new species of Cola (Sterculiaceae) from the Usambara Mountains, Tanzania. Kew Bulletin 57: 417–422.
* Cheek, M., 2003. Cola lukei. In: IUCN. 2006 Red list of threatened species. [Internet] http://www.iucnredlist.org. September 2006.
* CJB & SANBI, 2006. African Flowering Plants Database. [Internet] Conservatoire et Jardin botaniques de la Ville de Genève (CJB) and South African National Biodiversity Institute (SANBI), Pretoria, South Africa. http://www.ville-ge.ch/ cjb/bd/africa/ index.php. September 2006.
* Muir, C., 1998. A study to investigate the factors affecting the distribution of Cola usambarensis, an endangered endemic tree of the East Usambara Mountains, Tanzania. [Internet] A study to investigate the factors affecting the distribution of Cola usambarensis, an endangered endemic tree of the East Usambara Mountains, Tanzania. http://easternarc.or.tz/ downloads/E-Usam/ Cola%20usambarensis%20MSc.pdf December 2007.
* Wild, H., 1961. Sterculiaceae. In: Exell, A.W. & Wild, H. (Editors). Flora Zambesiaca. Volume 1, part 2. Crown Agents for Oversea Governments and Administrations, London, United Kingdom. pp. 517–564.