1. V. P. Afanas’ev and S. Ya. Yavor, Electrostatic Energy Analyzers for Charged Particle Beams (Nauka, Moscow, 1978) [in Russian].
2. G. I. Zhabreev and S. K. Zhdanov, Zh. Tekh. Fiz. 49(11), 2450 (1979) [Sov. Phys. Tech. Phys. 24, No. 11 (1979)].
3. V. A. Kurnaev and V. A. Urusov, Pis’ma Zh. Tekh. Fiz. 36(10), 24 (2010) [Tech. Phys. Lett. 36, 454 (2010)].
4. Yu. K. Golikov, N. K. Krasnova, and I. A. Martsinovskii, Nauch. Priborostr. 21(3), 68 (2011).
5. N. K. Krasnova, Zh. Tekh. Fiz. 81(6), 97 (2011) [Tech. Phys. 56, 843 (2011)].