GYLLING, H. A.; AIRAKSINEN, T. In memoriam: Sirkku Kristiina Hellsten (1962-2018). Ajatus, [S. l.], v. 75, n. 1, p. 9–12, 2018. Disponível em: https://journal.fi/ajatus/article/view/77484. Acesso em: 22 marras. 2024.