1. A history of switching-mode Class-E techniques;Grebennikov;IEEE Microw Mag,2018
2. Designing the vacuum-tube generator, operating on detuned load (in Russian);Khvilivitsky;Radiotekhnika,1953
3. A new concept of significant increasing of fundamental power and efficiency of generator, operating in saturation mode (in Russian);Khmelnitsky;Radiotekhnika,1955
4. Operation of Vacuum-Tube Generator on Detuned Resonant Circuit (in Russian);Khmelnitsky,1962
5. Design equations for a new class of amplifier;de Buda,1962