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- International Journal of Geographical Information Science 19(5):501-536 (2005)
- Netherlands Institute for Scientific Information: Royal Netherlands Academy of Arts and Sciences, (2004)
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- Proceedings of the 2006 international symposium on Wikis, page 79-88. Odense, Denmark, ACM, (2006)
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- Proceedings of the 4th international conference on Knowledge capture, page 47-54. Whistler, BC, Canada, ACM, (2007)
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