Polychlorinated biphenyls and organochlorine pesticides in baltic and atlantic gray seal (Halichoerus grypus) pups. Environmental Toxicology and Chemistry, 22(11), pp.2789 - 2799. Available at: https://setac.onlinelibrary.wiley.com/doi/abs/10.1897/02-556., 2003.
Selective transfer of persistent organic pollutants and their metabolites in grey seals during lactation. Environment International, 46, pp.6 - 15. Available at: http://www.sciencedirect.com/science/article/pii/S0160412012000955., 2012.