@inproceedings{DeJager-etAl:2003:SIGDIAL,
  author = {de Jager, Samson  and  Wright, Nick  and  Knott, Alistair},
  title = {Speaker-independent context update rules for dialogue management },
  booktitle = {Proceedings of the Fourth {SIGdial} Workshop on Discourse and Dialogue},
  editor = {Akira Kurematsu and Alexander Rudnicky and Syun Tutiya},
  url = {http://www.aclweb.org/anthology/W03-2121},
  year = 2003,
  pages = {72--78}