1. Nynas Transformer Oil Handbook. 2011. Stockholm Sweden, 10.2011.
2. IEC 62535. 2009. Insulating Liquids—Test Method for Detection of Potentially Corrosive Sulfur in Used and Unused Insulating Oil.
3. ASTM D130-19. 2019. Standard Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test.
4. Pagger, E. 2013. Alternative insulating liquids compared to the classic mineral oil, Doctoral thesis, Graz University of Technology.
5. Rafiq, M., et al. 2020. Sustainable, renewable and environmental-friendly insulation systems for high voltage applications, review, MDPI. Molecules. https://doi.org/10.3390/molecules25173901.