1. 1) American Society of Mechanical Engineers: ASME B31G - Manual for determining the remaining strength of corroded pipelines, New York, (1991).
2. 2) J. Kiefner and P. Vieth: A modified criterion for evaluating the strength of corroded pipe-Final Report on project PR 3-805, (the Pipeline Supervisory Committee of the American Gas Association, Ohio: Battelle, 1989).
3. 3) J. Kiefner and P. Vieth: Oil Gas J. 88 (1990) 56–59.
4. 4) D. Norske Veritas: DNV RP-F101, Corroded pipelines-recommended practice, Hovik, (2004).
5. 5) http://www.eurofitnet.org