Chuah, C. H. ’, G. C.L. Eel, and S.H. Goh. “Ouregidione from Goniothalamus Velutinus (Annonaccae)”. Malaysian Journal of Science 18, no. 1 (April 29, 1999): 59–62. Accessed December 23, 2024. https://ajba.um.edu.my/index.php/MJS/article/view/9390.