Xiuxian ZhangXiaorong ZhuJoint Optimization Algorithm of Training Delay and Energy Efficiency for Wireless Large-Scale Distributed Machine Learning Combined With Blockchain for 6G Networks.31602-316182024October11IEEE Internet Things J.19https://doi.org/10.1109/JIOT.2024.3418463db/journals/iotj/iotj11.html#ZhangZ24streams/journals/iotj