@inproceedings{Higashinaka:2003:ACL,
  author = {Higashinaka, Ryuichiro  and  Nakano, Mikio  and  Aikawa, Kiyoaki},
  title  = {Corpus-Based Discourse Understanding in Spoken Dialogue Systems},
  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/P03-1031.pdf},
  year   = 2003,
  pages  = {240--247}
}