Fitrilina, M. I. Rusydi, Rahmadi Kurnia, Noverika Windasari, and Raffi Zahrandhika Putra, “A Stratified Modeling-Machine Learning Approach to Improve the Accuracy of Non-Invasive Blood Glucose Estimation Using Photoplethysmography Signals”, Int. J. Onl. Eng., vol. 21, no. 06, pp. pp. 76–96, May 2025.