Smedshaug, C. A., S. E. Lund, A. Brekke, G. A. Sonerud, och T. Rafoss. ”The Importance of the Farmland-Forest Edge for Area Use of Breeding Hooded Crows As Revealed by Radio Telemetry”. Ornis Fennica 79, no. 1 (mars 31, 2002): 1–13. åtkomstdatum maj 18, 2024. https://ornisfennica.journal.fi/article/view/133565.