@InCollection{Straccia99,
  author = 	 "Straccia, Umberto",
  title = 	 "A Framework for the Retrieval of Multimedia Objects Based on Four-Valued Fuzzy
               Description Logics",
  booktitle =	 "Soft Computing in Information Retrieval: Techniques and Applications",
  publisher =	 "Physica Verlag (Springer Verlag)",
  year =	 1999,
  editor =	 "Crestani, F. and Pasi, Gabriella",
  address =	 "Heidelberg, Germany"
}