A. A. Breslavets, Z. E. Eremenko, G. O. Rudnev, M. P. Natarov, V. V. Glamazdin, O. I. Shubnyi, O. A. Voitovich, Zhu Gang, Li Rong, and A. A. Prokopenko, Small-sized X-band open resonator for wide-range permittivity measurements of solid-state dielectrics, Low Temp. Phys. 48, (2022) [Fiz. Nyzk. Temp. 48, 1194–1200, (2022)] DOI: https://doi.org/10.1063/10.0015115.