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IEEE Transactions on Learning Technologies > 2015 > 8 > 1 > 5 - 17
IEEE Annals of the History of Computing > 2013 > 35 > 3 > 6 - 18
IEEE Transactions on Learning Technologies > 2015 > 8 > 1 > 5 - 17
IEEE Annals of the History of Computing > 2013 > 35 > 3 > 6 - 18