FRIEDMAN, Robert Marc. Making Sense of the Aurora: A Research Project. Nordlit, Tromsø, Norway, n. 29, p. 59–68, 2012. DOI: 10.7557/13.2301. Disponível em: https://septentrio.uit.no/index.php/nordlit/article/view/2301. Acesso em: 14 jun. 2026.