@inproceedings{lowercomplexityboundsforfinitesumconvex,
  title = {Lower Complexity Bounds for Finite-Sum Convex-Concave Minimax Optimization Problems},
  author = {Guangzeng Xie and Luo Luo and Yijiang Lian and Zhihua Zhang},
  year = {2020},
  booktitle = {ICML 2020 1},
  url = {https://proceedings.icml.cc/static/paper_files/icml/2020/4031-Paper.pdf},
}