@misc{izacard2021unsupervised,
  title={Unsupervised Dense Information Retrieval with Contrastive Learning},
  author={Gautier Izacard and Mathilde Caron and Lucas Hosseini and Sebastian Riedel and Piotr Bojanowski and Armand Joulin and Edouard Grave},
  year={2021},
  eprint={2112.09118},
  archivePrefix={arXiv},
  primaryClass={cs.IR},
  url={https://arxiv.org/abs/2112.09118}
}