Blockchain for Secure-GaS: Blockchain-Powered Secure Natural Gas IoT System With AI-Enabled Gas Prediction and Transaction in Smart City[J] IEEE INTERNET OF THINGS JOURNAL 2021(8) Xiao, Wenjing Liu, Chen Wang, Haoquan Zhou, Ming Hossain, M. Shamim Alrashoud, Mubarak Muhammad, Ghulam
