Ilyes Robert R. “Acanthodian Scales and Worm Tubes from the Kapp Kjeldsen Division of the Lower Devonian Wood Bay Formation, Spitsbergen”. Polar Research 14, no. 1 (January 6, 1995): 89-92. Accessed December 2, 2024. https://polarresearch.net/index.php/polar/article/view/1938.