Borisova, A. B., A. . Machulyansky, D. . Tatarchuk, Y. . Yakimenko, and T. . Volkhov. “Microwave Properties of Single-Crystal Materials With Sillenite Structure”. Electronics and Communications, vol. 16, no. 3, Mar. 2011, pp. 6-8, doi:10.20535/2312-1807.2011.16.3.264009.