GRØNVIK, Sidsel. Preface- Ringed Seals in the North Atlantic. NAMMCO Scientific Publications, Tromsø, Norway, v. 1, p. 3, 1998. DOI: 10.7557/3.2977. Disponível em: https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2977. Acesso em: 22 apr. 2026.