LOCKYER, Christina; MACKEY, Beth; READ, Fiona; HÄRKÖNEN, Tero; HASSELMEIER, Ilk. Age determination methods in harbour seals (Phoca vitulina) with a review of methods applicable to carnivores. NAMMCO Scientific Publications, Tromsø, Norway, v. 8, p. 245–263, 2010. DOI: 10.7557/3.2688. Disponível em: https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2688. Acesso em: 22 apr. 2026.