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)
Y. Gil, and V. Ratnakar. Proceedings of the 15th International Florida Artificial Intelligence Research Society Conference, page 413--418. Menlo Park, CA, AAAI Press, (2002)