@InProceedings{varges-riccardi-quarteroni:2008:SIGDIAL,
  author    = {Varges, Sebastian  and  Riccardi, Giuseppe  and  Quarteroni, Silvia},
  title     = {Persistent Information State in a Data-Centric Architecture},
  booktitle = {Proceedings of the 9th SIGdial Workshop on Discourse and Dialogue},
  month     = {June},
  year      = {2008},
  address   = {Columbus, Ohio},
  publisher = {Association for Computational Linguistics},
  pages     = {68--71},
  url       = {http://www.aclweb.org/anthology/W/W08/W08-0109}
}