Yang, Bin, Shanyong Yi, Ruiling Zhang, and Mohammad Farris Iman Leong Abdullah. “Adverse Psychological and Therapeutic Effects of Kratom (Mitragyna Speciosa) Use: A Systematic Review”. Malaysian Journal of Medicine and Health Sciences 19, no. 5 (September 30, 2023): 218–236. Accessed November 9, 2025. http://mjmhsojs.upm.edu.my/index.php/mjmhs/article/view/627.