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IEEE Sensors Journal > 2011 > 11 > 3 > 699 - 710
IEEE Sensors Journal > 2011 > 11 > 3 > 711 - 721
IEEE Transactions on Pattern Analysis and Machine Intelligence > 2011 > 33 > 6 > 1087 - 1097
2010 2nd International Conference on Signal Processing Systems > 2 > V2-389 - V2-393