@InProceedings{gella-cook-han:2013:*SEM,
  author    = {Gella, Spandana  and  Cook, Paul  and  Han, Bo},
  title     = {Unsupervised Word Usage Similarity in Social Media Texts},
  booktitle = {Second Joint Conference on Lexical and Computational Semantics (*SEM), Volume 1: Proceedings of the Main Conference and the Shared Task: Semantic Textual Similarity},
  month     = {June},
  year      = {2013},
  address   = {Atlanta, Georgia, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {248--253},
  url       = {http://www.aclweb.org/anthology/S13-1036}
}