@InProceedings{wei-gulla:2010:ACL,
  author    = {Wei, Wei  and  Gulla, Jon Atle},
  title     = {Sentiment Learning on Product Reviews via Sentiment Ontology Tree},
  booktitle = {Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics},
  month     = {July},
  year      = {2010},
  address   = {Uppsala, Sweden},
  publisher = {Association for Computational Linguistics},
  pages     = {404--413},
  url       = {http://www.aclweb.org/anthology/P10-1042}
}