Norhanom, A., Y. Ashril, K. Awang, and A. Hamid A. Hadi. “Testing of Kaempferia Galanga Extracts Against Cancer Cell Lines”. Malaysian Journal of Science, vol. 18, no. 1, Apr. 1999, pp. 31-33, https://juku.um.edu.my/index.php/MJS/article/view/9381.