Peel, J.S. “Systematics and Mode of Life of a New Silurian Clisospira (Mollusca) from North Greenland”. Rapport Grønlands Geologiske Undersøgelse 128 (December 31, 1986): 65–74. Accessed July 3, 2024. https://geusjournals.org/index.php/rapggu/article/view/7925.