1. Bocquier, P.: World urbanization prospects: an alternative to the un model of projection compatible with the mobility transition theory. Demographic Res. 12, 197–236 (2005)
2. Qin, H., Li, H., Zhao, X.: Development status of domestic and foreign smart city. Global Presence 9, 50–52 (2010)
3. Alevtina, D., Xu, Z., Ryu, S., Michael, S., Wang, F.: Secure and trustable electronic medical records sharing using blockchain. In AMIA annual symposium proceedings, vol. 2017, p. 650. American Medical Informatics Association (2017)
4. Sultana, T., Almogren, A., Akbar, M., Zuair, M., Ullah, I., Javaid, N.: Data sharing system integrating access control mechanism using blockchain-based smart contracts for iot devices. Appl. Sci. 10(2), 488 (2020)
5. Xie, S., Zheng, Z., Chen, W., Jiajing, W., Dai, H.-N., Imran, M.: Blockchain for cloud exchange: a survey. Comput. Electric. Eng. 81, 106526 (2020)