@inproceedings{Widdows:2003:ACL,
  author = {Widdows, Dominic},
  title  = {Orthogonal Negation in Vector Spaces for Modelling Word-Meanings and Document Retrieval},
  booktitle = {Proceedings of the 41st Annual Meeting of the Association for Computational Linguistics},
  editor = {Erhard Hinrichs and Dan Roth},
  url    = {http://www.aclweb.org/anthology/P03-1018.pdf},
  year   = 2003,
  pages  = {136--143}
}