Thaisongkroh, Phairin, and Saroj Pullteap. “Investigation of Fiber Optic-Based-Refractometer for Biogas Sensing”. Applied Science and Engineering Progress 16, no. 4 (October 4, 2023): 6793. accessed August 27, 2026. https://ph02.tci-thaijo.org/index.php/ijast/article/view/250766.