Chuah, C. ’, K. Lee’, S. Goh, and S. Goh. “Alkaloids from Litsea Elliptibacea (Lauraccae)°”. Malaysian Journal of Science, vol. 18, no. 1, Apr. 1999, pp. 63-66, https://ajba.um.edu.my/index.php/MJS/article/view/9391.