@inproceedings{kamigaito-etal-2015-hierarchical,
    title = "Hierarchical Back-off Modeling of {H}iero Grammar based on Non-parametric {B}ayesian Model",
    author = "Kamigaito, Hidetaka  and
      Watanabe, Taro  and
      Takamura, Hiroya  and
      Okumura, Manabu  and
      Sumita, Eiichiro",
    editor = "M{\`a}rquez, Llu{\'i}s  and
      Callison-Burch, Chris  and
      Su, Jian",
    booktitle = "Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing",
    month = sep,
    year = "2015",
    address = "Lisbon, Portugal",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/Add-Cong-Liu-Florida-Atlantic-University-author-id/D15-1143/",
    doi = "10.18653/v1/D15-1143",
    pages = "1217--1227"
}