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3. DNV, 2006, “Free Spanning Pipelines”, Recommended Practice DNV-RP-F105, Det Norske Veritas, Norway.
4. DNV, 2007, “Submarine Pipeline Systems”, Offshore Standard 0S-F101, Det Norske Veritas, Norway.
5. Fyrileiv, O., Mørk, K., Kathrud, K. & Sortland, L. 1998, “Free Span Assessment of the Zeepipe IIA Pipeline”, Proceedings of the 17thInternational Conference on Offshore Mechanics and Arctic Engineering.