Elias T. Ayuk, Bahiru Duguma, Steve Franzel, Joseph Kengue, Matthias Mollet, Theophile Tiki-Manga and Pauline Zenkeng 1999. USES, MANAGEMENT AND ECONOMIC POTENTIAL OF GARCINIA KOLA AND <em>RICINODENDRON</em> <em>HEUDELOTII</em> IN THE HUMID LOWLANDS OF CAMEROON. Journal of Tropical Forest Science (JTFS) . 11, 4 (Oct. 1999), 746–761.