@InProceedings{hirakawa:2006:POS,
  author    = {Hirakawa, Hideki},
  title     = {Graph Branch Algorithm: An Optimum Tree Search Method for Scored Dependency Graph with Arc Co-Occurrence Constraints},
  booktitle = {Proceedings of the COLING/ACL 2006 Main Conference Poster Sessions},
  month     = {July},
  year      = {2006},
  address   = {Sydney, Australia},
  publisher = {Association for Computational Linguistics},
  pages     = {361--368},
  url       = {http://www.aclweb.org/anthology/P/P06/P06-2047}
}