1. Ajonina, H.N., Bassey, C.E., 1997. Stratigraphy and depositional environments of the Mamfe formation and its implication on the tectono-sedimentary evolution of the Ikom-Mamfe embayment. In: 15th Annual International Conference and Exhibition Book of Abstracts and Programme. Nigerian Association of the Petroleum Exploration (NAPE), 39p.
2. The Mamfé basin, SE Nigeria and SW Cameroon: a review of the basin filling model and tectonic evolution;Ajonina;Journal of the Geoscience Society of Cameroon,2001
3. The origin and evolution of the cretaceous Benue trough (Nigeria);Benkhelil;Journal of African Earth Sciences,1989
4. Berthois, L., 1975. Etude sédimentologique des roches meubles (techniques et méthodes), Doin éditeur, paris, 277p.
5. The alluvial sapphire profiles of Mayo Kewol placer in Adamawa region (north-Cameroon): granulometry and mineralogical features;Boaka à Koul;Journal of African Earth Sciences,2010