@article{sparsetransformerconcentratedattention,
  title = {Sparse Transformer: Concentrated Attention Through Explicit Selection},
  author = {Guangxiang Zhao and Junyang Lin and Zhiyuan Zhang and Xuancheng Ren and Xu sun},
  year = {2019},
  url = {https://openreview.net/forum?id=Hye87grYDH},
}