1. The generalised transformer: A new bidirectional, sinusoidal waveform frequency converter with continuously adjustable input power factor;Venturini M.;in PESC Record ‐ IEEE Annual Power Electronics Specialists Conference,1980
2. Solid-state power conversion: A Fourier analysis approach to generalized transformer synthesis
3. Analysis and Design of Forced Commutated Cycloconverter Structures with Improved Transfer Characteristics;Ziogas P. D.;IEEE Trans. Ind. Electron,1986
4. Direct Frequency Changer Operation Under a New Scalar Control Algorithm;Roy G.;IEEE Trans. Power Electron,1991