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IEEE Transactions on Multimedia > 2011 > 13 > 4 > 662 - 673
IEEE Transactions on Learning Technologies > 2008 > 1 > 3 > 145 - 156
IEEE Transactions on Multimedia > 2011 > 13 > 4 > 662 - 673
IEEE Transactions on Learning Technologies > 2008 > 1 > 3 > 145 - 156