@article(2007-a-statistical-user-simulation-technique-for-the-improvement-of-a-spoken-dialog-system,
  author = {Lluís Felip Hurtado Oliver and David Griol Barres and Emilio Sanchis Arnal and Encarna Segarra Soriano},
  title = {A Statistical User Simulation Technique for the Improvement of a Spoken Dialog System},
  year = {2007},
  journal = {Lecture Notes in Computer Science},
  number = {4756},
  pages = {743-752}
)