@InProceedings{A_Policy_Based_Approach_to_Security_for_the_Semantic_Web,
  author = "Lalana  Kagal and Tim  Finin and Anupam  Joshi",
  title = "{A Policy Based Approach to Security for the Semantic Web}",
  month = "September",
  year = "2003",
  booktitle = "2nd International Semantic Web Conference (ISWC2003)",
}