Tarnowski, Karol, and Wlodzimierz Salejda. “Photonic Band Structure of Fibonacci Superlattices With Metamaterials. Part 2: The Algebraic Method of Calculation for Absorptive Metamaterial Layers”. Photonics Letters of Poland, vol. 1, no. 3, Sept. 2009, pp. pp. 130-132, doi:10.4302/photon. lett. pl.v1i3.52.