@InProceedings{xie-chen:2013:BEA8,
  author    = {Xie, Shasha  and  Chen, Lei},
  title     = {Evaluating Unsupervised Language Model Adaptation Methods for Speaking Assessment},
  booktitle = {Proceedings of the Eighth Workshop on Innovative Use of NLP for Building Educational Applications},
  month     = {June},
  year      = {2013},
  address   = {Atlanta, Georgia},
  publisher = {Association for Computational Linguistics},
  pages     = {288--292},
  url       = {http://www.aclweb.org/anthology/W13-1737}
}