5 http://www.uksaf.org/tech/spr.html
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7 http://scientopia.org/blogs/skullsinthestars/2010/09/21/optics-basics-surface-plasmons/
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9 http://paos.colorado.edu/research/wavelets/wavelet1.html
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11 http://www.amara.com/IEEEwave/IW_wave_vs_four.html
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