@inproceedings{zhou-etal-2014-group,
    title = "Group Non-negative Matrix Factorization with Natural Categories for Question Retrieval in Community Question Answer Archives",
    author = "Zhou, Guangyou  and
      Chen, Yubo  and
      Zeng, Daojian  and
      Zhao, Jun",
    editor = "Tsujii, Junichi  and
      Hajic, Jan",
    booktitle = "Proceedings of {COLING} 2014, the 25th International Conference on Computational Linguistics: Technical Papers",
    month = aug,
    year = "2014",
    address = "Dublin, Ireland",
    publisher = "Dublin City University and Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/C14-1010/",
    pages = "89--98"
}