Derkachova, Anastasiya, and Krystyna Kolwas. “Simple Analytic Tool for Spectral Control of Dipole Plasmon Resonance Frequency for Gold and Silver Nanoparticles”. Photonics Letters of Poland, vol. 5, no. 2, June 2013, pp. pp. 69-71, doi:10.4302/photon. lett. pl.v5i2.403.