Johansen, H.M., Selås, V., Fagerland, K., Johnsen, J.T., Sveen, B.-A., Tapia, L. ja Steen, R. 2007. Goshawk diet during the nestling period in farmland and forest-dominated areas in southern Norway . Ornis Fennica. 84, 4 (joulu 2007), 181–188.