NYBERG, Tore. Katharina Krumpin. Personalhistorisk Tidsskrift, [S. l.], v. 80, n. 14_2_0102, p. 43–53, 1960. Disponível em: https://tidsskrift.dk/personalhistorisk_tidsskrift/article/view/79688. Acesso em: 8 dec. 2025.