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IEEE Sensors Journal > 2017 > 17 > 4 > 1154 - 1164
IEEE Communications Surveys & Tutorials > 2017 > 19 > 1 > 482 - 511
IEEE Communications Surveys & Tutorials > 2017 > 19 > 3 > 1457 - 1477
IEEE Sensors Journal > 2016 > 16 > 10 > 3939 - 3947