Portsel, Aleksandr. «The Poliarnaia Kochegarka Newspaper as a Source on the Soviet Mining on Spitsbergen in the 1930–1980s: A Brief Bibliographical Survey». Nordlit, no. 45 (februar 1, 2020): 139–149. åpnet oktober 12, 2026. https://septentrio.uit.no/index.php/nordlit/article/view/4992.