Μ. Bollen, Understanding Power Quality Problems: Voltage Sags and Interruptions, Anderson P.M., pp. 190-198, 2000.
 M. Moschakis, S. Loutridis, V. Dafopoulos, A. Anastasiadis, T. Tomtsi, E. Karapidakis, and A. Tsikalakis, “Prediction of Voltage Sags Applying the Method of Critical Distances to Meshed Power Networks”, in Proc. of IEEE PMAPS (Probabilistic Methods Applied to Power Systems) Conference, pp. 570-575, Istanbul, Turkey, June 10-14, 2012.
 M. Aung, and J. Milanovic, “The Influence of Transformer Winding Connections on the Propagation of Voltage Sags”, IEEE Trans. on Power Delivery, vol. 21, no. 1, pp. 262–269, January 2006.
 M. McGranaghan, D. Mueller, and M. Samotyj, “Voltage Sags in Industrial Systems”, IEEE Trans. on Industry Applications, vol. 29, no. 2, pp. 397–403, March/April 1993.
 J. Moshtagh, and H. P. Souraki “Characteristics Analysis of Voltage Sag and Voltage Swell in Multi-Grounded Four-Wire Power Distribution Systems”, World Academy of Science, Engineering and Technology, Issue 31, July 2009.
 IEC 60076-1 Standard, Power Transformers – Part 1: General, 1999.
 IEEE C57.12.00 Standard, General Requirements for Liquid Immersed Distribution, Power, and Regulating Transformers, 2000.
 IEEE C57.12.70 Standard, Terminal Markings and Connections for Distribution and Power Transformers, 2000.
 M. N. Moschakis, V. V. Dafopoulos, I. G. Andritsos, E. S. Karapidakis, and J. M. Prousalidis, "The Effect of Transformer’s Vector Group on Retained Voltage Magnitude and Sag Frequency at Industrial Sites Due to Faults", International Journal of Electrical Science and Engineering Vol:7 No:7, 2013.
 R. C. Dugan et al., Electrical Power Systems Quality, 2nd ed. ser. Professional Engineering. New York: McGraw-Hill, 2002.
 IEEE Recommended Practice for Design of Reliable Industrial and Commercial Power Systems, 1997.
 IEEE Recommended Practice for Evaluating Electric Power System Compatibility with Electronic Process Equipment, 1998.
 A Draft Standard Glossary of Power Quality Terminology, Jul. 15, 1999. P1433/D5A, Prepared by The Working Group on Power Quality Definitions of SCC22-Power Quality.
 M. Bollen and L. Zhang, “Analysis of voltage tolerance of ac adjustable-speed drives for three-phase balanced and unbalanced sags,” IEEE Trans. Ind. Appl., vol. 36, no. 3, pp. 904–910, May/Jun. 2000.
 Official Government Gazette of the Hellenic Republic 78/B’, Article No: 13 – Electrical Power Network Short-circuit Power, pp579, January 20, 2017.
 Official Government Gazette of the Hellenic Republic 78/B’, Article No: 15 – Electrical Power Network Grounding, pp580, January 20, 2017.
 Manitoba HVDC Research Center, PSCAD-Power Systems Simulation Software, Version 4.2, Canada, 2004.