Eva Garde, Mads Peter Heide-Jørgensen, Steen H. Hansen, Gösta Nachman, Mads C. Forchhammer: Age-Specific Growth and Remarkable Longevity in Narwhals ( Monodon monoceros ) from West Greenland as Estimated by Aspartic Acid Racemization. Journal of Mammalogy, 28.2.2007, 88. vsk, nro 1, s. 49–58. doi:10.1644/06-MAMM-A-056R.1ISSN 0022-2372Artikkelin verkkoversio. (englanti)
iucnredlist.org
Lowry, L., Laidre, K. & Reeves, R.: Monodon monocerosIUCN Red List of Threatened Species. Version 2017.3. 2017. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 18.1.2018. (englanniksi)
Silverman, H. B., Dunbar, M. J.: Aggressive tusk use by the narwhal (Monodon monoceros L.). Nature, 6.3.1980, nro 284, s. 57–58. Lontoo: Macmillan Publishers Ltd. doi:10.1038/284057a0 Artikkelin verkkoversio. Viitattu 6.4.2012. (englanniksi)
oup.com
academic.oup.com
Eva Garde, Mads Peter Heide-Jørgensen, Steen H. Hansen, Gösta Nachman, Mads C. Forchhammer: Age-Specific Growth and Remarkable Longevity in Narwhals ( Monodon monoceros ) from West Greenland as Estimated by Aspartic Acid Racemization. Journal of Mammalogy, 28.2.2007, 88. vsk, nro 1, s. 49–58. doi:10.1644/06-MAMM-A-056R.1ISSN 0022-2372Artikkelin verkkoversio. (englanti)
worldcat.org
Eva Garde, Mads Peter Heide-Jørgensen, Steen H. Hansen, Gösta Nachman, Mads C. Forchhammer: Age-Specific Growth and Remarkable Longevity in Narwhals ( Monodon monoceros ) from West Greenland as Estimated by Aspartic Acid Racemization. Journal of Mammalogy, 28.2.2007, 88. vsk, nro 1, s. 49–58. doi:10.1644/06-MAMM-A-056R.1ISSN 0022-2372Artikkelin verkkoversio. (englanti)