1. Benito, G.R.G., et al.: A cluster analysis of the maritime sector in Norway. Int. J. Transp. Manag. 1(4), 203–215 (2003)
2. Sharma, A., et al.: Catching up with time? Examining the STCW competence framework for autonomous shipping (2019)
3. Jakobsen, E.W., et al.: The Leading Maritime Capitals of the world. Menon Economics - DNVGL, Oslo (2019)
4. Fruth, M., Teuteberg, F.: Digitalization in martime logistics - what is there and what is missing? Cogent Bus. Manag. 4(1), 1411066 (2017). University of Osnabrück
5. Norwegian Shipowner’s Association: Maritime Outlook Report 2019, Oslo (2019)