@inproceedings{kidwell-etal-2009-statistical,
    title = "Statistical Estimation of Word Acquisition with Application to Readability Prediction",
    author = "Kidwell, Paul  and
      Lebanon, Guy  and
      Collins-Thompson, Kevyn",
    editor = "Koehn, Philipp  and
      Mihalcea, Rada",
    booktitle = "Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing",
    month = aug,
    year = "2009",
    address = "Singapore",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/D09-1094/",
    pages = "900--909"
}