1. IEEE Standard 519, IEEE recommended practices and requirements for harmonic control in electric power systems. IEEE-519; 1992.
2. IEC 61000-3-2 (2001-10) consolidated edition. Electromagnetic compatibility (EMC) – part 3-2: limits for harmonic current emissions.
3. Energy flow and power factor in nonsinusoidal circuits;Shepherd,1979
4. Power system harmonics;Arrillaga,1985
5. Electric power quality;Heydt,1991