Kudyshev, Zh.A., I.R. Gabitov, A. Kissan, and Ye.S. Mukhametkarimov. 2018. “Hyperbolic Metamaterials Based on Graphene Sheets With Different Values of Chemical Potentials”. Physical Sciences and Technology 3 (2):4-11. https://doi.org/10.26577/phst-2016-2-100.