@article(2005-cluster-analysis-of-railway-directory-inquire-dialogs,
  author = {Emilio Sanchis Arnal and Paolo Rosso},
  title = {Cluster Analysis of Railway Directory Inquire Dialogs},
  year = {2005},
  journal = {Lecture Notes in Computer Science},
  volume = {3658},
  pages = {385-392}
)