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IEEE Internet Computing > 2014 > 18 > 5 > 20 - 27
IEEE Transactions on Knowledge and Data Engineering > 2011 > 23 > 4 > 496 - 511
IEEE Internet Computing > 2011 > 15 > 6 > 24 - 31
2010 IEEE 2nd Symposium on Web Society > 388 - 391
2010 2nd International Conference on Education Technology and Computer > 4 > V4-182 - V4-184