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IEEE Access > 2017 > 5 > 22209 - 22223
IEEE Sensors Journal > 2016 > 16 > 4 > 1026 - 1037
IEEE Transactions on Systems, Man, and Cybernetics, Part C (Applications... > 2011 > 41 > 2 > 179 - 189
IEEE Sensors Journal > 2011 > 11 > 3 > 582 - 592