O. A. Yeshchenko, V. V. Kozachenko, and A. V. Tomchuk, “Surface Plasmon Resonance in ‘Monolayer of Ni Nanoparticles/Dielectric Spacer/Au (Ni) Film’ Nanostructure: Tuning by Variation of Spacer Thickness”, Ukr. J. Phys., vol. 63, no. 5, p. 386, Jul. 2018.