Roza Lia, M., Harmadi, H., & Muttaqin, A. . (2022). Development of Measuring Instruments for Lung Vital Capacity and Human Respiratory Rate Based on Fiber Optic Sensors. JURNAL ILMU FISIKA, 15(1), 39–47. https://doi.org/10.25077/jif.15.1.39-47.2023