@misc{karpukhin2020dense,
  title={Dense Passage Retrieval for Open-Domain Question Answering},
  author={Vladimir Karpukhin and Barlas Oğuz and Sewon Min and Ledell Wu and Sergey Edunov and Danqi Chen and Wen-tau Yih},
  year={2020},
  eprint={2004.04906},
  archivePrefix={arXiv},
  primaryClass={cs.CL},
  url={https://arxiv.org/abs/2004.04906}
}