1. ISO 15589-1. Petroleum, petrochemical and natural gas industries — Cathodic protection of pipeline systems, Part 1: On-land pipelines; 2015.
2. EN 50162. Protection against corrosion by stray current from direct current systems; 2004.
3. EN 15280. Evaluation of a.c. corrosion likelihood of buried pipelines applicable to cathodically protected pipelines; 2013.