@InProceedings{li-nguyen-zweig:2008:SIGDIAL,
  author    = {Li, Zhifei  and  Nguyen, Patrick  and  Zweig, Geoffrey},
  title     = {Optimal Dialog in Consumer-Rating Systems using POMDP Framework},
  booktitle = {Proceedings of the 9th SIGdial Workshop on Discourse and Dialogue},
  month     = {June},
  year      = {2008},
  address   = {Columbus, Ohio},
  publisher = {Association for Computational Linguistics},
  pages     = {104--111},
  url       = {http://www.aclweb.org/anthology/W/W08/W08-0118}
}