1. EfficienSea, http://www.efficiensea.eu [acc. 2011-09-27].
2. Garbebring, T. (2011). Passagen som aldrig sover: Ständig kontroll i sundet. In Sjörapporten, 7, 10-12. Norrköping: Sjöfartsverket.
3. Hutchins, E. (1995). Cognition in the wild. Cambridge: MIT Press.
4. ICS, International Chamber of Shipping. (2007). Bridge procedures guide. Forth edition. London: Witherby.
5. IMO, International Maritime Organization. (1972). International Regulations for Preventing Collisions at Sea. London: IMO.