Asian Journal of Agricultural Research 2 ( 1 ): 32 - 36 , 2008
International Journal of Agricultural Research 3 ( 3 ): 211 - 218 , 2008
I. K. Addai and O. Safo-Kantanka
International Journal of Botany 2 ( 2 ): 152 - 155 , 2006
Journal of Plant Sciences 2 ( 6 ): 607 - 612 , 2007