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Journal of Visual Languages and Computing > 2015 > 31 > Part B > 230-236
IEEE Transactions on Human-Machine Systems > 2014 > 44 > 5 > 638 - 649
IEEE Transactions on Knowledge and Data Engineering > 2012 > 24 > 3 > 520 - 532
Journal of Science Education and Technology > 2012 > 21 > 2 > 246-254
Learning and Instruction > 2011 > 21 > 2 > 205-219
IEEE Transactions on Learning Technologies > 2008 > 1 > 3 > 145 - 156
Information Processing and Management > 2008 > 44 > 1 > 340-357