@inproceedings{han-choi-1994-reestimation,
    title = "A Reestimation Algorithm for Probabilistic ttecursive Transition Network",
    author = "Han, Young S.  and
      Choi, Key-Sun",
    booktitle = "{COLING} 1994 Volume 2: The 15th {I}nternational {C}onference on {C}omputational {L}inguistics",
    year = "1994",
    url = "https://aclanthology.org/C94-2138/"
}