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3. BSI (2012) BS EN ISO 19905-1:2012: Petroleum and natural gas industries. In: Site-specific assessment of mobile offshore units—part 1: jack-ups. BSI, London, UK
4. Drilling Formulas (2018) Basic information about jack up rig legs.
http://www.drillingformulas.com/basic-information-about-jack-up-rig-legs/
5. Elsayed K (2013) The road to Saqqara—Jack-up units and move.
https://www.slideshare.net/kemo44/the-road-to-saqqara-jackup-units-and-move