@InProceedings{yih:2009:EMNLP,
  author    = {Yih, Wen-tau},
  title     = {Learning Term-weighting Functions for Similarity Measures},
  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     = {793--802},
  url       = {http://www.aclweb.org/anthology/D/D09/D09-1083}
}