REIJNDERS, Peter JH; BRASSEUR, Sophie MJM; TOUGAARD, Svend; SEIBERT, Ursula; BORCHARDT, Thomas; STEDE, Michael. Population development and status of harbour seals (Phoca vitulina) in the Wadden Sea. NAMMCO Scientific Publications, Tromsø, Norway, v. 8, p. 95–105, 2010. DOI: 10.7557/3.2677. Disponível em: https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2677. Acesso em: 2 may. 2026.