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IEEE Antennas and Propagation Magazine > 2009 > 51 > 3 > 138 - 147
2008 Congress on Image and Signal Processing > 5 > 403 - 407
IEEE Transactions on Signal Processing > 2008 > 56 > 8-1 > 3613 - 3626
IEEE Transactions on Signal Processing > 2008 > 56 > 8-1 > 3458 - 3467