Pannavira, and Aditiya Hermawan. “Multimodal Wearable-Based Stress Detection Using Machine Learning: A Systematic Review of Validation Protocols and Generalization Gaps (2021 – 2025)”. Ultimatics : Jurnal Teknik Informatika 17, no. 2 (January 8, 2026): 203–213. Accessed March 27, 2026. https://ejournals.umn.ac.id/index.php/TI/article/view/4488.