1. Okorondu S. I., Adeleye, S. A. Okorondu, M. M. O. Review on medicinal plants. Nigerian journal of Microbiology, 29(2015) 3167-3183.
2. Petrovska, B.B. History review of medicinal plants' usage. Pharmacognosy Review. 6 (11) (2012) 1-5.
3. Iwu, M.M., Duncan, A.R. and Okunji, C.O. New Antimicrobials of plant origin. In Janick, J. (ed) Perspectives in New crops and New uses. ASHS Press, Alexandria, V. A, 1999, Pp 457-462.
4. Asaolu, M.F. Chemical composition and phytochemical screening of the seeds of Garcinia kola. Pakistan Journal of Science and industrial research, 46(2003) 145-147.
5. Ciulei, I. Practical Manuals on the Industrial Utilization of Medicinal and Aromatic plants, University of Bucharest, Romania (1964).