@inproceedings{ren-etal-2021-pair,
    title = "{PAIR}: Leveraging Passage-Centric Similarity Relation for Improving Dense Passage Retrieval",
    author = "Ren, Ruiyang  and
      Lv, Shangwen  and
      Qu, Yingqi  and
      Liu, Jing  and
      Zhao, Wayne Xin  and
      She, QiaoQiao  and
      Wu, Hua  and
      Wang, Haifeng  and
      Wen, Ji-Rong",
    editor = "Zong, Chengqing  and
      Xia, Fei  and
      Li, Wenjie  and
      Navigli, Roberto",
    booktitle = "Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021",
    month = aug,
    year = "2021",
    address = "Online",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/2021.findings-acl.191/",
    doi = "10.18653/v1/2021.findings-acl.191",
    pages = "2173--2183"
}