@inproceedings(2009-learning-the-structure-of-human-computer-and-human-human-dialogs,
  author = {David Griol Barres and Giuseppe Riccardi and Emilio Sanchis Arnal},
  title = {Learning the Structure of Human-Computer and Human-Human Dialogs},
  year = {2009},
  booktitle = {European Conference on Speech Communication and Technology (EUROSPEECH)},
  address = {Brighton Reino Unido},
  pages = {2775-2778}
)