@inproceedings{liu-etal-2009-clustering,
    title = "Clustering to Find Exemplar Terms for Keyphrase Extraction",
    author = "Liu, Zhiyuan  and
      Li, Peng  and
      Zheng, Yabin  and
      Sun, Maosong",
    editor = "Koehn, Philipp  and
      Mihalcea, Rada",
    booktitle = "Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing",
    month = aug,
    year = "2009",
    address = "Singapore",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-emnlp/D09-1027/",
    pages = "257--266"
}