@InProceedings{ultes-schmitt-minker:2013:NAACL-HLT,
  author    = {Ultes, Stefan  and  Schmitt, Alexander  and  Minker, Wolfgang},
  title     = {On Quality Ratings for Spoken Dialogue Systems -- Experts vs. Users},
  booktitle = {Proceedings of the 2013 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies},
  month     = {June},
  year      = {2013},
  address   = {Atlanta, Georgia},
  publisher = {Association for Computational Linguistics},
  pages     = {569--578},
  url       = {http://www.aclweb.org/anthology/N13-1064}
}