@article(2004-dialogue-act-classification-in-a-spoken-dialogue-system,
  author = {María José Castro Bleda and David Vilar and Pablo Aibar and Emilio Sanchis Arnal},
  title = {Dialogue Act Classification in a Spoken Dialogue System},
  year = {2004},
  journal = {Lecture Notes in Computer Science},
  volume = {3040},
  pages = {260-270}
)