@InProceedings{tackstrom-mcdonald:2011:ACL-HLT2011,
  author    = {T\"{a}ckstr\"{o}m, Oscar  and  McDonald, Ryan},
  title     = {Semi-supervised latent variable models for sentence-level sentiment analysis},
  booktitle = {Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies},
  month     = {June},
  year      = {2011},
  address   = {Portland, Oregon, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {569--574},
  url       = {http://www.aclweb.org/anthology/P11-2100}
}