@ARTICLE{23qlx-tmc,
  author = {Zhe Qu and Xingyu Li and Jie Xu and Bo Tang and Zhuo Lu and Yao Liu},
  title = {On the Convergence of Multi-Server Federated Learning with Overlapping Area},
  journal = {IEEE Transactions on Mobile Computing},
  volume = {},
  number = {},
  pages = {},
  year = {To Appear}
}