1. Guide for the application, specification, and testing of phase-shifting transformers. in IEC 62032:2012 (E) (Revision of IEC 62032-2005 and IEEE Std C57.135-2001); July 16 2012. pp. 1–44.
2. Verboomen J, Hertem DV, Schavemaker PH, Kling WL, Belmans R. Phase shifting transformers: principles and applications. In: International Conference on Future Power Systems, Amsterdam, Netherlands, 18 Nov. 2005.
3. Phase shifting transformer model for direct approach power flow studies;Cano;Int J Electr Power Energy Syst,2017
4. McIver J. Phase shifting transformers –principles, design aspects and operation. SIEMENS Energy, Inc, Weiz, Austria, Mar, 2015. [Online]. Available: .
5. Blackburn JL, Domin TJ. Protective relaying principles and applications. (CRC Press, Boca Raton, 2006¸ 3rd ed.), ch. 9, sec. 6-13, p. 328–343.