1. L. A. Rassvetalov, Functional Electronics [in Russian], Yaroslav Mudry State University of Novgorod, Novgorod (1999). 167
2. U. Kh. Kopvillem and S. V. Prants, Polarization Echo [in Russian], Nauka, Moscow (1985).
3. E. Apushkinsky and M. Astrov, Phys. B, 321, Nos. 1–4, 408 (2002).
4. M. M. Nesterov, I. V. Pleshakov, and Ya. A. Fofanov, Nauch. Priborostr., 16, No. 2, 3 (2006).
5. M. I. Kurkin, Phys. Met. Metallogr., 89, No. 1, S48 (2000).