V.D. Taffouo, O.F. Wamba, E. Youmbi, G.V. Nono and A. Akoa
International Journal of Botany 6 ( 1 ): 53 - 58 , 2010
O.F. Wamba, V.D. Taffouo, E. Youmbi, B. Ngwene and A. Amougou
Journal of Agronomy 11 ( 2 ): 31 - 42 , 2012