“A New Silurian Hemiarges (Trilobita) from North Greenland and the Question of the Polaris Harbour Formation”. Rapport Grønlands Geologiske Undersøgelse 101 (December 31, 1980): 45–53. Accessed December 19, 2025. https://geusjournals.org/index.php/rapggu/article/view/7718.