1. Neumann, C., et al.: Some thoughts regarding prototype installation tests of gas-insulated HVDC systems. In: CIGRÉ Winnipeg (2017)
2. IEC 62895:2017: High voltage direct current (HVDC) power transmission - Cables with extruded insulation and their accessories for rated voltages up to 320 kV for land applications - Test methods and requirements
3. Hallas, M., Hinrichsen, V.: General overview of AC and DC current injection on high voltage potential for HVDC long-term tests. In: CIGRÉ Hakodate (2019)
4. Hallas, M., Wietoska, T., Hinrichsen, V.: Generator for current injection on high DC potential to test HVDC equipment. In: ISH Buenos Aires (2017)
5. Schufft, W., Schiering, S.: Developmets in power engineering and their demands on high-voltage test equipment. In: ELECO (1999)