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IEEE Transactions on Learning Technologies > 2009 > 2 > 3 > 189 - 202
IEEE Transactions on Education > 2009 > 52 > 3 > 328 - 339
2008 IEEE Asia-Pacific Services Computing Conference > 1471 - 1476
IEEE Transactions on Learning Technologies > 2009 > 2 > 3 > 189 - 202
IEEE Transactions on Education > 2009 > 52 > 3 > 328 - 339
2008 IEEE Asia-Pacific Services Computing Conference > 1471 - 1476