E.T.S. Putra, W. Zakaria, N.A.P. Abdullah and G.B. Saleh
American Journal of Plant Physiology 7 ( 2 ): 84 - 96 , 2012
I.F. Ibrahim, S.K. Balasundram, N.A.P. Abdullah, M.S. Alias and M. Mardan
International Journal of Botany 8 ( 3 ): 96 - 106 , 2012