1. API 1 7D. Specification for Subsea Wellhead and Christmas tree equipment.
2. API 14E RP. Offshore piping design section 2.5, version 1991.
3. API 2RD RP. Design of risers for floating production systems, and tension leg platforms.
4. API 580. (May 2002). Risk based inspection (1st ed).
5. Baker, J. A. (January 2007). Report – the BP US Refineries Independent Safety Review Panel.