GRÜNTHAL, R. Martti Kahla 1928–2019. Finnisch-Ugrische Forschungen, [S. l.], v. 2020, n. 65, p. 212–215, 2020. DOI: 10.33339/fuf.99938. Disponível em: https://journal.fi/fuf/article/view/99938. Acesso em: 18 sep. 2021.