@article{
  author={Shigang Li and Tal Ben-Nun and Giorgi Nadiradze and Salvatore Di Girolamo and Nikoli Dryden and Dan Alistarh and Torsten Hoefler},
  title={{Breaking (Global) Barriers in Parallel Stochastic Optimization with Wait-Avoiding Group Averaging}},
  journal={IEEE Transactions on Parallel and Distributed Systems},
  year={2021},
  pages={1725-1739},
  volume={32},
  number={7},
  publisher={IEEE},
  doi={10.1109/TPDS.2020.3040606},
}