@inproceedings{Simpson_2008,
  title = "On the need for user-defined fine-grained access control policies for social networking applications",
  author = "Simpson, A.~C.",
  year = "2008",
  booktitle = "Proceedings of the 2008 workshop on Security in Opportunistic and SOCial networks (SOSOC 2008)",
  pages = "Article number 1",
  publisher = "ACM",
}