1. G. I. Veselov and S. B. Raevskii, Layered Metal-Dielectric Waveguides (Radio i Svyaz’, Moscow, 1988) [in Russian].
2. R. V. Budaragin and A. A. Radionov, “Method for Calculating Waveguides with a Smooth Irregular Shielding Surface,” Antenny 85(6), 25–30 (2004).
3. R. V. Budaragin, A. A. Radionov, and A. A. Titarenko, “Calculation of Tapers in a Circular Shielded Waveguide,” Fiz. Voln. Protsessov Radiotekh. Sist. 3(2), 27–30 (2000).
4. B. Z. Katsenelenbaum, Theory of Irregular Waveguides with Slowly Varying Parameters (Akad. Nauk SSSR, Moscow, 1961) [in Russian].
5. V. V. Shevchenko, Tapers in Open Waveguides (Nauka, Moscow, 1963) [in Russian].