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IEEE Transactions on Education > 2011 > 54 > 2 > 273 - 278
2010 IEEE Frontiers in Education Conference (FIE) > S3J-1 - S3J-6
2010 IEEE Frontiers in Education Conference (FIE) > F1J-1 - F1J-6
2010 International Conference on Educational and Information Technology > 2 > V2-226 - V2-229