@article{442,
  author = {Jheng-Hong Yang and Xueguang Ma and Jimmy Lin},
  title = {Sparsifying Sparse Representations for Passage Retrieval by Top-K Masking},
  year = {2021},
  journal = {ArXiv},
  volume = {abs/2112.09628},
  url = {https://arxiv.org/abs/2112.09628},
}