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IEEE Revista Iberoamericana de Tecnologias del Aprendizaje > 2017 > 12 > 1 > 62 - 69
IEEE Transactions on Education > 2011 > 54 > 4 > 576 - 581
2008 38th Annual Frontiers in Education Conference > F1H-18 - F1H-23
2008 38th Annual Frontiers in Education Conference > T3A-16 - T3A-19