1. Adewumi, I.K. (1999), Development of a Commercial Grade Activated Charcoal Using Palm Kernel Shells, Unpublished M.Sc. thesis, Obafemi Awolowo University (OAU), Ile-Ife.
2. Adewumi, I.K. (2006), Characterization and Specification of Activated Charcoal Produced from Palm Kernel Shells for Water Treatment, Ph.D. thesis, Obafemi Awolowo University, Ile-Ife.
3. Adewumi, I.K. and Ogedengbe, M.O. (2005), Optimizing conditions for activated charcoal production from palm kernel shells, Pakistan Journal of Applied Sciences, 8(6):1082–1087.
4. Grayson, M. (ed) (1985), Kirk-Othmer Concise Encyclopaedia of Chemical Technology, Wiley, New York, pp. 97–105.
5. Guo, J. and Lua, A.C. (2000a), Preparation and characterization of adsorbents from oil palm fruit solid wastes, Journal of Oil Palm Research, 12:64–70.