S.JayaChitra1, S.Kavin, S.Sasi, and R.Sethupathi. “IOT Based Coal Mine Workers Safety Monitoring and Alerting System”. International journal of intellectual advancements and research in engineering computations 10, no. 2 (June 17, 2022): 188–191. Accessed April 26, 2024. https://ijiarec.com/ijiarec/article/view/1732.