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IEEE Transactions on Biomedical Circuits and Systems > 2014 > 8 > 3 > 345 - 357
IEEE Sensors Journal > 2008 > 8 > 8 > 1445 - 1454
Transactions of the IRE Professional Group on Broadcast and Television... > 1954 > PGBTR-5 > 1 > 64 - 70