1. “Resonant backward scattering of light by a subwavelength metallic slit with two open sides”. Kukhlevsky SV, Mechler M, Csapó L, Janssens K, Samek O, Physical review : B : condensed matter and materials physics 72, 165421 (2005).   http://doi.org/10.1103/PHYSREVB.72.165421