Humlum Ole, Instanes Arne, and Sollid Johan Ludvig. “Permafrost in Svalbard: A Review of Research History, Climatic Background and Engineering Challenges”. Polar Research 22, no. 2 (January 12, 2003): 191-215. Accessed November 30, 2024. https://polarresearch.net/index.php/polar/article/view/2108.