1. G. S. Kandaurova, Sorosovskii Obraz. Zh., No. 1, 100 (1997).
2. I. V. Zavislyak, V. I. Kostenko, T. G. Chamor, and L. V. Chevnyuk, Tech. Phys. 50, 520 (2005).
3. V. I. Kostenko, A. M. Sorochak, T. G. Chamor, and L. V. Chevnyuk, Tech. Phys. 53, 1379 (2008).
4. V. I. Kostenko, A. I. Pyatnitsa, A. M. Sorochak, T. G. Chamor, and L. V. Chevnyuk, in Proceedings of the 20th International Crymean Conference on Microwave Devices and Telecommunication Technologies, Sevastopol’, 2010, pp. 783–784.
5. Z. R. Yang, M. Lange, A. Volodin, R. Szymczak, and V. V. Moshchalkov, Nat. Mater. 3, 793 (2004).