Ying, Tan Shu, Kwan Li See, Yoshiyuki Hirata, Lai-Keng Chan, Yasuo Nagaoka, and Shinichi Uesato. “Cytotoxic Activity of Cell Suspension Cultured and Plant Derived Crude Extracts of Tongkat Ali (Eurycoma Longifolia Jack) Against Human Cancer Cell Lines”. International Journal of Scientific Research in Biological Sciences 7, no. 3 (June 30, 2020): 1–10. Accessed April 4, 2025. https://ijsrbs.isroset.org/index.php/j/article/view/360.