@InProceedings{rotaru-litman:2007:ACLMain,
  author    = {Rotaru, Mihai  and  Litman, Diane},
  title     = {The Utility of a Graphical Representation of Discourse Structure in Spoken Dialogue Systems},
  booktitle = {Proceedings of the 45th Annual Meeting of the Association of Computational Linguistics},
  month     = {June},
  year      = {2007},
  address   = {Prague, Czech Republic},
  publisher = {Association for Computational Linguistics},
  pages     = {360--367},
  url       = {http://www.aclweb.org/anthology/P/P07/P07-0046}
}