@article{zhu2021unifying,
  title={Unifying Nonlocal Blocks for Neural Networks},
  author={Zhu, Lei and She, Qi and Li, Duo and Lu, Yanye and Kang, Xuejing and Hu, Jie and Wang, Changhu},
  journal={arXiv preprint arXiv:2108.02451},
  year={2021}
}