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IEEE Transactions on Education > 2014 > 57 > 4 > 248 - 254
IEEE Transactions on Education > 2013 > 56 > 3 > 308 - 315
IEEE Transactions on Learning Technologies > 2012 > 5 > 1 > 2 - 10
IEEE Transactions on Education > 2014 > 57 > 4 > 248 - 254
IEEE Transactions on Education > 2013 > 56 > 3 > 308 - 315
IEEE Transactions on Learning Technologies > 2012 > 5 > 1 > 2 - 10