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IEEE Signal Processing Letters > 2010 > 17 > 2 > 185 - 188
IEEE Transactions on Information Forensics and Security > 2009 > 4 > 3 > 441 - 450
IEEE Transactions on Systems, Man, and Cybernetics, Part B (Cybernetics) > 2009 > 39 > 2 > 530 - 538