Characteristics of Blockchain and Smart Services, for Smart Governments: A systematic review of the literature[J] IJISPM-INTERNATIONAL JOURNAL OF INFORMATION SYSTEMS AND PROJECT MANAGEMENT 2022(10) Mohamed, Ahmed Alfatih D. Alkhateeb, Yazan M. Agarwal, Puneet Abdelwahab, Ahmed R. Alrababah, Osamah Abu Salim, Taghreed