@misc{cao2021towards,
  title={Towards On-Device Federated Learning: A Direct Acyclic Graph-based Blockchain Approach},
  author={Mingrui Cao and Long Zhang and Bin Cao},
  year={2021},
  eprint={2104.13092},
  archivePrefix={arXiv},
  primaryClass={cs.DC},
  url={https://arxiv.org/abs/2104.13092}
}