Mangerud, Gunn, Niall W. Paterson, and Jonathan Bujak. “Permian Palynoevents in the Circum-Arctic Region”.
Atlantic Geoscience
57, no. 1 (January 24, 2021): 057–069. Accessed May 18, 2025. https://journals.lib.unb.ca/index.php/ag/article/view/31497.