@article(2009-answering-questions-with-an-n-gram-based-passage-retrieval-engine,
  author = {Davide Buscaldi and Paolo Rosso and José Manuel Gómez Soriano and Emilio Sanchis Arnal},
  title = {Answering questions with an n -gram based passage retrieval engine},
  year = {2009},
  journal = {JOURNAL OF INTELLIGENT INFORMATION SYSTEMS},
  volume = {82},
  pages = {1-22}
)