- (2007)
- GIR '05: Proceedings of the 2005 workshop on Geographic information retrieval, page 39--44. New York, NY, USA, ACM, (2005)
- Data \& Knowledge Engineering 63(3):947--971 (December 2007)
- WikiSym'06: Proceedings of the international symposium on Symposium on Wikis, page 69--78. New York, NY, USA, ACM Press, (2006)


user