@article{edgeassistedhierarchicalfederatedlearnin,
  title = {Client-Edge-Cloud Hierarchical Federated Learning},
  author = {Lumin Liu and Jun Zhang and S. H. Song and Khaled B. Letaief},
  year = {2019},
  eprint = {1905.06641},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1905.06641v2},
}