Selås, V., R. Tveiten, and O. M. Aanonsen. “Diet of Common Buzzards Buteo Buteo in Southern Norway Determined from Prey Remains and Video Recordings”. Ornis Fennica, vol. 84, no. 3, Sept. 2007, pp. 97–104, https://ornisfennica.journal.fi/article/view/133685.