Gunawan, Michael Surya, Ridwan Kurniaji, Abdul Hamid Arribathi, Untung Rahardja, and Lokae Fern. 2026. “Automating Hazardous Gas Mitigation in Enclosed Areas Using Smart Contracts and Sensors”. Blockchain Frontier Technology 6 (2):229∼240. https://doi.org/10.34306/b-front.v6i2.1200.