M.A, Sukari, Neoh, B.K, Rashid N.Y, Jalil W.N.F.W.A, Rahmani M, Lajis N.H, Ee, G.C.L, and Ali A.M. 2005. “Studies on the Constituents and Medicinal Properties of Some Zingiberaceous Species”. Malaysian Journal of Science 24 (1):143-47. http://mjs.um.edu.my/index.php/MJS/article/view/8951.