@inproceedings{duh-kirchhoff-2004-automatic,
    title = "Automatic Learning of Language Model Structure",
    author = "Duh, Kevin  and
      Kirchhoff, Katrin",
    booktitle = "{COLING} 2004: Proceedings of the 20th International Conference on Computational Linguistics",
    month = "aug 23–aug 27",
    year = "2004",
    address = "Geneva, Switzerland",
    publisher = "COLING",
    url = "https://preview.aclanthology.org/fix-sig-urls/C04-1022/",
    pages = "148--154"
}