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IEEE Transactions on Learning Technologies > 2014 > 7 > 3 > 221 - 230
2012 16th Panhellenic Conference on Informatics > 387 - 392
IEEE Transactions on Learning Technologies > 2011 > 4 > 4 > 327 - 339
IEEE Transactions on Learning Technologies > 2014 > 7 > 3 > 221 - 230
2012 16th Panhellenic Conference on Informatics > 387 - 392
IEEE Transactions on Learning Technologies > 2011 > 4 > 4 > 327 - 339