1. Harmonic reduction in multiplex converters by triple-frequency current injection;Bird,1969
2. A new method to eliminate AC harmonic currents by magnetic compensation consideration on basic design;Sasaki;IEEE Trans. Power Appl. Syst.,1971
3. Active AC power filters;Gyugi,1976
4. Generalized theory of the instantaneous reactive power in three-phase circuits;Akagi,1983
5. Effective reactive and apparent powers in circuits with nonsinusoidal waveforms;Fryze;Electrotehn. Zeitshr.,1932