@article {moran2016electromagnetic, title = {Electromagnetic Scattering at the Waveguide Step between Equilateral Triangular Waveguides}, journal = {Advances in Mathematical Physics}, volume = {2016}, year = {2016}, publisher = {Hindawi Publishing Corporation}, author = {Mor{\'a}n-L{\'o}pez, Ana and J C{\'o}rcoles and Ruiz-Cruz, Jorge A and Montejo-Garai, Jos{\'e} R and Rebollar, Jes{\'u}s M} }