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IEEE Internet Computing > 2015 > 19 > 6 > 18 - 25
IEEE Transactions on Learning Technologies > 2015 > 8 > 2 > 187 - 200
IEEE Communications Surveys & Tutorials > 2014 > 16 > 3 > 1771 - 1796
IEEE Transactions on Affective Computing > 2014 > 5 > 3 > 251 - 272
IEEE Embedded Systems Letters > 2014 > 6 > 2 > 17 - 20