Nilssen, Kjell Tormod, Nils-Erik Skavberg, Michael Poltermann, Tore Haug, Tero Härkönen, and Gunnar Henriksen. “Status of Harbour Seals (Phoca Vitulina) in Mainland Norway”. NAMMCO Scientific Publications 8 (September 1, 2010): 61–69. Accessed August 14, 2026. https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2672.