Tuan, Tran Anh, and Dao Thi Thanh Loan. “Predicting Stress During Sleep from Biosensor Data: An Optimized Machine Learning Framework”. Journal of Human, Earth, and Future 6, no. 3 (September 1, 2025): 640–653. Accessed October 11, 2025. https://www.hefjournal.org/index.php/HEF/article/view/575.