JOHNSEN, Jon; BAKKEN, Sverre; HOLMBERG, Carl. Meddelelser. Nordisk Tidsskrift for Kriminalvidenskab, [S. l.], v. 51, n. 1/2, p. 156–158, 1963. DOI: 10.7146/ntfk.v51i1/2.138033. Disponível em: https://tidsskrift.dk/NTfK/article/view/138033. Acesso em: 7 dec. 2025.