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IEEE Transactions on Learning Technologies > 2017 > 10 > 3 > 391 - 402
IEEE Transactions on Emerging Topics in Computing > 2017 > 5 > 1 > 20 - 31
IEEE Access > 2017 > 5 > 10968 - 10978
IEEE Revista Iberoamericana de Tecnologias del Aprendizaje > 2016 > 11 > 4 > 220 - 226
IEEE Transactions on Education > 2016 > 59 > 4 > 263 - 273