Wangensteen , B., T. Eiken, R. S. Ødegård, and J. L. Sollid. “Measuring Coastal Cliff Retreat in the Kongsfjorden Area, Svalbard, using Terrestrial Photogrammetry”. Polar Research, vol. 26, no. 1, Mar. 2007, pp. 14-21, doi:10.3402/polar.v26i1.6202.