@article(2008-user-simulation-in-a-stochastic-dialog-system,
  author = {Francisco Torres Goterris and Emilio Sanchis Arnal and Encarna Segarra Soriano},
  title = {User simulation in a stochastic dialog system},
  year = {2008},
  journal = {Computer Speech and Language},
  volume = {22},
  number = {3},
  pages = {230-255}
)