M.M.Arun prasath, J.Aakash, I.Acksar Ahamath, K.Gokul and S.Krishnan (2022) “IOT based manhole detection and monitoring system”, International journal of intellectual advancements and research in engineering computations, 10(2), pp. 183–187. Available at: https://ijiarec.com/ijiarec/article/view/1731 (Accessed: 30November2022).