@inproceedings{interactionqualityestimationinspoken,
  title = {Interaction Quality Estimation in Spoken Dialogue Systems Using Hybrid-HMMs},
  author = {Stefan Ultes and Wolfgang Minker},
  year = {2014},
  booktitle = {WS 2014 6},
  url = {https://aclanthology.org/W14-4328},
}