1. Cherepenin, V.A., Kontorov, S.M., Kulagin, V.V., et al., Proc. 48th Eur. Microwave Conf., Madrid, 2018, p. 796.
2. Kulagin, V.V., Valuev, V.V., Kontorov, S.M., et al., in Tr. Mezhdunar. Krymskoi konf. SVCh-tekhnika i telekommunikacionnye tekhnologii (Tr. Int. Crimean Conf. on Microwave Engineering and Telecommunication Technologies), Sevastopol, 2018, vol. 6, p. 1515.
3. Kulagin, V.V., Valuev, V.V., Kontorov, S.M., et al., Izv. Ross. Akad. Nauk, Ser. Fiz., 2020, vol. 84, no. 1, p. 67.
4. Valley, G.C., Opt. Express, 2007, vol. 15, no. 3, p. 1955.
5. Starikov, R.S., Usp. Sovrem. Radioelektron., 2015, no. 2, p. 3.