@article{sparsedenseandattentionalrepresentations,
  title = {Sparse, Dense, and Attentional Representations for Text Retrieval},
  author = {Yi Luan and Jacob Eisenstein and Kristina Toutanova and Michael Collins},
  year = {2020},
  eprint = {2005.00181},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2005.00181v3},
}