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The Journal of Systems & Software > 2012 > 85 > 9 > 2086-2095
IEEE Transactions on Education > 2012 > 55 > 1 > 99 - 106
The Journal of Systems & Software > 2012 > 85 > 9 > 2086-2095
IEEE Transactions on Education > 2012 > 55 > 1 > 99 - 106