1. British Standard BS 7430:1998, Code of Practice for Earthing.
2. British Standard BS EN 12954:2001, Cathodic Protection of Buried or Immersed Metallic Structures–General Principles and Applications for Pipelines.
3. A Guide for Assessing the Rise of Earth Potential at Substation Sites;Engineering Recommendation S34,1986
4. IEC/TS 60479-1:2005, Effects of Current on Human Beings and Livestock – Part 1: General Aspects.
5. IEEE Std 80:2000, IEEE Guide for safety in ac substation grounding.