WILLUMSEN, Liv Helene. Isaac Olsen: The First Missionary among the Sami People in Finnmark?. Nordlit, Tromsø, Norway, n. 43, p. 142–160, 2019. DOI: 10.7557/13.4977. Disponível em: https://septentrio.uit.no/index.php/nordlit/article/view/4977. Acesso em: 4 may. 2026.