Federated Learning with Blockchain Assisted Image Classification for Clustered UAV Networks[J] CMC-COMPUTERS MATERIALS & CONTINUA 2022(72) Abunadi, Ibrahim Althobaiti, Maha M. Al-Wesabi, Fahd N. Hilal, Anwer Mustafa Medani, Mohammad Hamza, Manar Ahmed Rizwanullah, Mohammed Zamani, Abu Serwar