DIGIOVANNI JR, Robert A; SABROSKY, Amber M. A note on seal watching in the Northeast United States. NAMMCO Scientific Publications, Tromsø, Norway, v. 8, p. 373–377, 2010. DOI: 10.7557/3.2700. Disponível em: https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2700. Acesso em: 21 apr. 2026.