Nielsen, N.H., Víkingsson, G.A., Hansen, S.H., Ditlevsen, S. and Heide-Jørgensen, M.P. 2017. Two techniques of age estimation in cetaceans: GLGs in teeth and earplugs, and measuring the AAR rate in eye lens nucleus. NAMMCO Scientific Publications. 10, (Aug. 2017). DOI:https://doi.org/10.7557/3.4184.