@inproceedings{BosKleinLemonOka2003SIGDIAL,
   title     = {DIPPER: Description and Formalisation of an Information-State Update Dialogue System Architecture},
   author    = {Bos, Johan and Klein, Ewan and Lemon, Oliver and Oka, Tetsushi},
   booktitle = {4th SIGdial Workshop on Discourse and Dialogue},
   address   = {Sapporo, Japan},
   pages     = {115--124},
   year      = {2003}
}