1. A. Sommerfeld, Vorlesungen über Theoretische Physik, Vol. 3: Elektrodynamik (Geest & Portig, Leipzig, 1949).
2. L. A. Vainshtein, Electromagnetic Waves (Sovetskoe Radio, Moscow, 1957) [in Russian].
3. B. Katsenelenbaum, High-Frequency Electrodynamics (Nauka, Moscow, 1966; Wiley-VCH, Weinheim, 2006).
4. V. V. Shevchenko, Gradual Transitions in Open Waveguides (Nauka, Moscow, 1969; Golem, Boulder, Colo., 1971).
5. N. A. Semenov, Technical Electrodynamics (Svyaz’, Moscow, 1973) [in Russian].