Sadowski, Ryszard F. “The Influence of Cultural Factors on the Collapse of the Greenland Norse Civilization”. Studia Ecologiae et Bioethicae 18, no. 5 (December 31, 2020): 217–233. Accessed May 7, 2024. https://czasopisma.uksw.edu.pl/index.php/seb/article/view/7219.