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IEEE Transactions on Learning Technologies > 2011 > 4 > 1 > 59 - 73
IEEE Transactions on Professional Communication > 2011 > 54 > 2 > 105 - 121
2010 International Computer Symposium (ICS2010) > 342 - 347
2010 Second WRI Global Congress on Intelligent Systems > 3 > 400 - 402
2010 International Computer Symposium (ICS2010) > 177 - 182