Puliafito, C., E. Mingozzi, F. Longo, A. Puliafito, and O. Rana,  "Fog computing for the Internet of Things: A survey",  ACM Transactions on Internet Technology - ACM, vol. 19, no. 2: Association for Computing Machinery, 2019.

Panarello, A., N. Tapas, G. Merlino, F. Longo, and A. Puliafito,  "Blockchain and iot integration: A systematic survey",  Sensors - MDPI, vol. 18, no. 8: MDPI AG, 2018.