@article{securebilevelasynchronousvertical,
  title = {Secure Bilevel Asynchronous Vertical Federated Learning with Backward Updating},
  author = {Qingsong Zhang and Bin Gu and Cheng Deng and Heng Huang},
  year = {2021},
  eprint = {2103.00958},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2103.00958v1},
}