Dietz, Rune, Paul Paludan-Müller, Carsten Thye Agger, and Christian Overgaard Nielsen. 1998. “Cadmium, Mercury, Zinc and Selenium in Ringed Seals (Phoca Hispida) from Greenland and Svalbard”. NAMMCO Scientific Publications 1 (June): 242-72. https://doi.org/10.7557/3.2992.