@InProceedings{ichikawa-EtAl:2006:POS,
  author    = {Ichikawa, Hiroshi  and  Hakoda, Keita  and  Hashimoto, Taiichi  and  Tokunaga, Takenobu},
  title     = {Efficient Sentence Retrieval Based on Syntactic Structure},
  booktitle = {Proceedings of the COLING/ACL 2006 Main Conference Poster Sessions},
  month     = {July},
  year      = {2006},
  address   = {Sydney, Australia},
  publisher = {Association for Computational Linguistics},
  pages     = {399--406},
  url       = {http://www.aclweb.org/anthology/P/P06/P06-2052}
}