JUNGFALK, Michael. Sikker øvning. Modspil, [S. l.], v. 10, n. 41, 1988. DOI: 10.7146/modspil.v10i41.159483. Disponível em: https://tidsskrift.dk/modspil/article/view/159483. Acesso em: 6 dec. 2025.