@inproceedings{sturm-etal-2001-adding,
    title = "Adding Extra Input/Output Modalities to a Spoken Dialogue System",
    author = "Sturm, Janienke  and
      Wang, Fusi  and
      Cranen, Bert",
    booktitle = "Proceedings of the Second {SIG}dial Workshop on Discourse and Dialogue",
    year = "2001",
    url = "https://preview.aclanthology.org/landing_page/W01-1622/"
}