@inproceedings{popescu-etal-2004-understanding,
    title = "Understanding Students' Explanations in Geometry Tutoring",
    author = "Popescu, Octav  and
      Aleven, Vincent  and
      Koedinger, Kenneth",
    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/C04-1196/",
    pages = "1339--1345"
}