@article{asimpleyetuniversalstrategyforonline,
  title = {Universal Online Convex Optimization Meets Second-order Bounds},
  author = {Lijun Zhang and Yibo Wang and Guanghui Wang and JinFeng Yi and Tianbao Yang},
  year = {2021},
  eprint = {2105.03681},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2105.03681v3},
}