@InProceedings{kidwell-lebanon-collinsthompson:2009:EMNLP,
  author    = {Kidwell, Paul  and  Lebanon, Guy  and  Collins-Thompson, Kevyn},
  title     = {Statistical Estimation of Word Acquisition with Application to Readability Prediction},
  booktitle = {Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing},
  month     = {August},
  year      = {2009},
  address   = {Singapore},
  publisher = {Association for Computational Linguistics},
  pages     = {900--909},
  url       = {http://www.aclweb.org/anthology/D/D09/D09-1094}
}