1. Headland RK (2016) Transits of the Northwest Passage to end of the 2013 navigation season. Atlantic Ocean – Arctic Ocean – Pacific Ocean. Il Polo, 71 (3), (im Druck)
2. Rothrock DA, Yu Y, Maykut GA (1999) Thinning of the Arctic sea-ice cover. Geophys Res Lett 26:3469–3472
3. Serreze, M (2008) National geographic news, 17. September
4. Serreze M (2010) Stellungnahme. In: Climate Progress, 9. September.
https://thinkprogress.org/serreze-arctic-is-continuing-down-in-a-death-spiral-every-bit-of-evidence-we-have-says-the-ice-is-4e061fec87e8/
5. Wadhams P (1990) Evidence for thinning of the Arctic ice cover north of Greenland. Nature 345:795–797