van Loon , A.J., M. Błaszkiewicz, and M. Degórski. “The Role of Permafrost in Shaping the Late Glacial Relief of Northern Poland”. Netherlands Journal of Geosciences 91 (March 24, 2014): 223 - 231. Accessed March 26, 2026. https://njgjournal.nl/index.php/njg/article/view/12140.