@article(2006-automatic-feature-extraction-for-question-classification-based-on-dissimilarity-of-probability-distributions,
  author = {David Tomás and José Luis Vicedo and Empar Bisbal and Lidia Ana Moreno Boronat},
  title = {Automatic Feature Extraction for Question Classification Based on Dissimilarity of Probability Distributions},
  year = {2006},
  journal = {Lecture Notes in Computer Science},
  volume = {4139},
  pages = {133-140}
)