@article{isonuma-etal-2021-unsupervised,
    title = "Unsupervised Abstractive Opinion Summarization by Generating Sentences with Tree-Structured Topic Guidance",
    author = "Isonuma, Masaru  and
      Mori, Junichiro  and
      Bollegala, Danushka  and
      Sakata, Ichiro",
    editor = "Roark, Brian  and
      Nenkova, Ani",
    journal = "Transactions of the Association for Computational Linguistics",
    volume = "9",
    year = "2021",
    address = "Cambridge, MA",
    publisher = "MIT Press",
    url = "https://aclanthology.org/2021.tacl-1.56/",
    doi = "10.1162/tacl_a_00406",
    pages = "945--961"
}