(EN) Olafsdóttir K, Petersen A, Magnúsdóttir EV, Björnsson T, Jóhannesson T., Temporal trends of organochlorine contamination in Black Guillemots in Icelandfrom 1976 to 1996 (abstract), in Environmental Pollution, vol. 133, n. 3, Feb 2005, pp. 509-15, DOI:10.1016/j.envpol.2004.06.016.
(EN) Olafsdóttir K, Petersen A, Magnúsdóttir EV, Björnsson T, Jóhannesson T., Temporal trends of organochlorine contamination in Black Guillemots in Icelandfrom 1976 to 1996 (abstract), in Environmental Pollution, vol. 133, n. 3, Feb 2005, pp. 509-15, DOI:10.1016/j.envpol.2004.06.016.