@InProceedings{mann-mccallum:2008:ACLMain,
  author    = {Mann, Gideon S.  and  McCallum, Andrew},
  title     = {Generalized Expectation Criteria for Semi-Supervised Learning of Conditional Random Fields},
  booktitle = {Proceedings of ACL-08: HLT},
  month     = {June},
  year      = {2008},
  address   = {Columbus, Ohio},
  publisher = {Association for Computational Linguistics},
  pages     = {870--878},
  url       = {http://www.aclweb.org/anthology/P/P08/P08-1099}
}