@inproceedings{zhai-etal-2011-simple,
    title = "Simple but Effective Approaches to Improving Tree-to-tree Model",
    author = "Zhai, Feifei  and
      Zhang, Jiajun  and
      Zhou, Yu  and
      Zong, Chengqing",
    booktitle = "Proceedings of Machine Translation Summit XIII: Papers",
    month = sep # " 19-23",
    year = "2011",
    address = "Xiamen, China",
    url = "https://preview.aclanthology.org/fix-sig-urls/2011.mtsummit-papers.29/"
}