.C. Rajan, S.Banu Chandar, P.Dhinesh Kumar and J.Francis Jebarson (2019) “IOT based platform as a service for air pollution monitoring system ”, International journal of intellectual advancements and research in engineering computations, 7(2), pp. 2509–2511. doi: 10.61096/ijiarec.v7.iss2.2019.2509-2511.