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IEEE Transactions on Education > 2014 > 57 > 4 > 242 - 247
2010 2nd International Conference on Education Technology and Computer > 1 > V1-343 - V1-345
IEEE Transactions on Education > 2009 > 52 > 1 > 177 - 184
2008 38th Annual Frontiers in Education Conference > F1A-15 - F1A-16