GEUST, C. F. Gunnar Lihr – a legendary Finnish aviator. Tekniikan Waiheita, [S. l.], v. 31, n. 3, p. 49–55, 2013. Disponível em: https://journal.fi/tekniikanwaiheita/article/view/64085. Acesso em: 15 huhti. 2025.