GRIFFITHS, D.; BORN, E. W.; ACQUARONE, M. Prolonged chemical restraint of walrus (<i>Odobenus rosmarus</i>) with etorphine supplemented with medetomidine. NAMMCO Scientific Publications, [S. l.], v. 9, p. 361–369, 2014. DOI: 10.7557/3.3015. Disponível em: https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3015. Acesso em: 26 may. 2022.