@article{sofanetsecondorderandfirstorder,
  title = {SOFA-Net: Second-Order and First-order Attention Network for Crowd Counting},
  author = {Haoran Duan and Shidong Wang and Yu Guan},
  year = {2020},
  eprint = {2008.03723},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2008.03723v1},
}