Dushkin, V.D., Zhuchenko, S. and Kostenko, O.V. 2019. Discrete mathematical model of the scattering process of E-polarized wave on a periodic impedance grating. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics. 90, (Dec. 2019), 4-25. DOI:https://doi.org/10.26565/2221-5646-2019-90-01.