+Other sources:\r
+\r
+wikipedia\r
+\r
+http://www.uksaf.org/tech/spr.html\r
+\r
+http://scientopia.org/blogs/skullsinthestars/2010/09/21/optics-basics-surface-plasmons/\r
+\r
+http://paos.colorado.edu/research/wavelets/wavelet1.html\r
+\r
+http://www.amara.com/IEEEwave/IW_wave_vs_four.html\r
+\r