Mahdi IF, Azzawi MM, Mohammed FS. Development of NDIR CO2 Gas Sensing System Based on U-Shaped Optical Cavity. Al-Mustansiriyah J. Sci. [Internet]. 2022 Dec. 30 [cited 2025 Apr. 4];33(4):136-40. Available from: https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/1184