@phdthesis{dnb-3382,
  title = {Facial Communicative Signals: valence recognition in task-oriented human-robot Interaction},
  author = {Christian Lang},
  year = {2012},
  url = {http://d-nb.info/1027478891},
  researchr = {https://researchr.org/publication/dnb-3382},
  cites = {0},
  citedby = {0},
  school = {Bielefeld University},
}