Helasvuo, K., Ivar Strahl, Knud Waaben, Jon Johnsen, and A. Haslund. “Litteratur”. Nordisk Tidsskrift for Kriminalvidenskab 49, no. 4 (November 29, 1961): 353–360. Accessed December 23, 2025. https://tidsskrift.dk/NTfK/article/view/70493.