Strand Petersen, Kaj. “The Environmental Changes Within the Seven Regions through the Late Quaternary Evaluated by the Molluscan Communities Met With in the Seven Stages”. GEUS Bulletin 3 (July 15, 2004): 151–171. Accessed March 28, 2024. https://geusbulletin.org/index.php/geusb/article/view/4762.