Affiliation: | 1. Kotelnikov Institute of Radio Engineering and Electronics (Saratov Branch), Russian Academy of Sciences, Saratov, 410019, Russia 2. Saratov State University, Saratov, 410012, Russia 3. Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, 125009, Russia 4. Scientific and Practical Materials Research Centre, National Academy of Sciences of Belarus, Minsk, 220072, Belarus
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