1. IEC 60076-3- Power Transformers - Part 3: Insulation Levels, Dielectric Tests and External Clearances in Air,2013
2. IEC 60060-1 High-Voltage Test Techniques Part 1: General Definitions and Test Requirements,2010
3. CIGRE WG A2/C4.39, Electrical Transient Interaction Between Transformers and the Power Systems,2013
4. Transformer Reliability Survey,2015
5. Measuring Techniques and Characteristics of Fast and Very Fast Transient Overvoltages in Substations and Converter Stations,2020