M.M.ARUN PRASATH; J.AAKASH; I.ACKSAR AHAMATH; K.GOKUL; S.KRISHNAN. IOT based manhole detection and monitoring system. International journal of intellectual advancements and research in engineering computations, [S. l.], v. 10, n. 2, p. 183–187, 2022. Disponível em: https://ijiarec.com/ijiarec/article/view/1731. Acesso em: 30 nov. 2022.