Fitrilina, Rusydi, M. I., Rahmadi Kurnia, Noverika Windasari, & Raffi Zahrandhika Putra. (2025). A Stratified Modeling-Machine Learning Approach to Improve the Accuracy of Non-Invasive Blood Glucose Estimation Using Photoplethysmography Signals. International Journal of Online and Biomedical Engineering (iJOE), 21(06), pp. 76–96. https://doi.org/10.3991/ijoe.v21i06.53815