Tomczyk, Aleksandra M., and Marek Ewertowski. “Changes of Arctic Landscape Due to Human Impact, North Part of Billefjorden Area, Svalbard”. Quaestiones Geographicae 29, no. 1 (April 5, 2010): 75–83. Accessed May 6, 2024. https://pressto.amu.edu.pl/index.php/qg/article/view/v10117-010-0008-3.