Kokate, Piyush, Shashikant Sadistap, and Anirban Middey. “Atmospheric CO2 Level Measurement and Discomfort Index Calculation With the Use of Low-Cost Drones”. Engineering, Technology & Applied Science Research 13, no. 5 (October 13, 2023): 11728–11734. Accessed May 11, 2025. https://etasr.com/index.php/ETASR/article/view/6230.