M. Acquarone, E. W. Born, D. Griffiths, L. Ø. Knutsen, Ø. Wiig, and I. Gjertz, “Evaluation of etorphine reversed by diprenorphine for the immobilisation of free-ranging Atlantic walrus (Odobenus rosmarus rosmarus L.)”, NAMMCOSP, vol. 9, pp. 345–360, Apr. 2014, doi: 10.7557/3.2944.