@article{huang2021starfl,
  title={Starfl: Hybrid federated learning architecture for smart urban computing},
  author={Huang, Anbu and Liu, Yang and Chen, Tianjian and Zhou, Yongkai and Sun, Quan and Chai, Hongfeng and Yang, Qiang},
  journal={ACM Transactions on Intelligent Systems and Technology (TIST)},
  volume={12},
  number={4},
  pages={1--23},
  year={2021},
  publisher={ACM New York, NY}
}