@inproceedings{morita-etal-2011-query,
    title = "Query Snowball: A Co-occurrence-based Approach to Multi-document Summarization for Question Answering",
    author = "Morita, Hajime  and
      Sakai, Tetsuya  and
      Okumura, Manabu",
    editor = "Lin, Dekang  and
      Matsumoto, Yuji  and
      Mihalcea, Rada",
    booktitle = "Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies",
    month = jun,
    year = "2011",
    address = "Portland, Oregon, USA",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P11-2039/",
    pages = "223--229"
}