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IEEE Transactions on Circuits and Systems II: Express Briefs > 2010 > 57 > 8 > 647 - 651
Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on > 2 > 613 - 616 vol.2
Electronics Letters > 1990 > 26 > 2 > 119 - 121
Electronics Letters > 1989 > 25 > 22 > 1499 - 1500