D. Sonntag, P. Wennerberg, P. Buitelaar, and S. Zillner. Cases on Semantic Interoperability for Information Systems Integration: Practices and Applications, chapter 8, IGI Global, Hershey, PA, (2009)
S. Hosain, and H. Jamil. Social Semantic Web: Where Web 2.0 Meets Web 3.0, Papers from the 2009 AAAI Spring Symposium, SS-09-08, page 53--58. Menlo Park, CA, AAAI Press, (2009)