S. S. Syed Abd. Aziz, M. R. Mukhtar, A. H. A. Hadi, N. R. Abdullah, and K. Awang, “Isoquinoline Alkaloids and Antimalarial Properties of Popowia Perakensis Extract”, J. Sci. Math. Lett., vol. 1, no. 2, pp. 80–86, Dec. 2009, Accessed: May 03, 2025. [Online]. Available: https://ejournal.upsi.edu.my/index.php/JSML/article/view/382