1. “A new high-efficiency high-power amplifier,”;Tyler;Marconi Review,1958
2. “A Fourier analysis of radio-frequency power amplifier waveforms,”;Hallman;Proceedings of the IRE,1932
3. “A theoretical analysis and experimental confirmation of the optimally loaded and over-driven RF power amplifier,”;Snider;IEEE Transactions on Electron Devices,1967
4. “Biharmonic modes of tuned power amplifier,”;Fuzik;Telecommunications and Radio Engineering, Part 2,1970