By Tong Xiaohua   Shi Wenzhong   Liu Dajie   in International Journal of Geographical Information Science

ISSN:1365-8824|23|11|1413-1432

Taylor & Francis Ltd‎(2009)‎

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By Liu Dajie   Blenn Norbert   Mieghem Piet Van   in International Journal of Web Based Communities

ISSN:1477-8394|9|3|371-391

Inderscience Publishers‎(2013)‎

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