@InProceedings{henriksson-velupillai:2010:W10-31,
  author    = {Henriksson, Aron  and  Velupillai, Sumithra},
  title     = {Levels of certainty in knowledge-intensive corpora: an initial annotation study},
  booktitle = {Proceedings of the Workshop on Negation and Speculation in Natural Language Processing},
  month     = {July},
  year      = {2010},
  address   = {Uppsala, Sweden},
  publisher = {University of Antwerp},
  pages     = {41--45},
  url       = {http://www.aclweb.org/anthology/W/W10/W10-3107}
}