Ardi, M., F. Pristianto, M. Nurkahfi, and R. Yasi. “Rancang Bangun Monitoring Gas Belerang Oksida Berbasis Internet of Things Studi Kasus Gunung Ijen”. Journal of Telecommunication Electronics and Control Engineering (JTECE), Vol. 1, no. 02, July 2019, pp. 88-93, doi:10.20895/jtece.v1i02.90.