IEC 60296:2012, Fluids for electrotechnical applications – Unused mineral insulating oils for transformers and switchgear
IEC 60422:2013, Mineral insulating oils in electrical equipment – Supervision and maintenance guidance
CIGRE Brochure 378:2009, Copper sulphide in transformer insulation
CIGRE Brochure 413:2010, Insulating Oil Regeneration and Dehalogenation
CIGRE Brochure 625:2015, Copper Sulphide long term mitigation and risk assessment