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IEEE Transactions on Software Engineering > 2017 > 43 > 9 > 848 - 867
IEEE Transactions on Learning Technologies > 2017 > 10 > 1 > 30 - 41
IEEE Transactions on Software Engineering > 2017 > 43 > 9 > 848 - 867
IEEE Transactions on Learning Technologies > 2017 > 10 > 1 > 30 - 41