A. I. Skibenko, I. B. Pinos, Y. V. Kovtun, E. I. Skibenko, and E. V. Syus’ko, “Application of Microwave Ray Refraction in Inhomogeneous Plasma Interferometry”, Ukr. J. Phys., vol. 61, no. 8, p. 715, Jan. 2019.