@inproceedings{varges-etal-2008-persistent,
    title = "Persistent Information State in a Data-Centric Architecture",
    author = "Varges, Sebastian  and
      Riccardi, Giuseppe  and
      Quarteroni, Silvia",
    editor = "Schlangen, David  and
      Hockey, Beth Ann",
    booktitle = "Proceedings of the 9th {SIG}dial Workshop on Discourse and Dialogue",
    month = jun,
    year = "2008",
    address = "Columbus, Ohio",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/W08-0109/",
    pages = "68--71"
}