1. IEC 61508. Functional safety of electrical/electronic/programmable electronic (E/E/PE) safety related systems. Part 1–7, Edition 1.0 (various dates).
2. IEC 61511. Functional safety: safety instrumented systems for the process industry sector. Part 1–3, CDV versions.
3. 070 OLF guideline on the application of IEC 61508 and IEC 61511 in the petroleum activities on the Norwegian Continental Shelf, OLF, Rev. 01, 26-01-01, see http://www.itk.ntnu.no/sil.
4. The introduction of IEC 61511 in Norwegian offshore industry;Hauge,2001
5. NPD2001. Regulations relating to management in the petroleum activities (The Management Regulations). The Norwegian Petroleum Directorate; September 2001.