1. Radioecological investigations;Aarkrog;Nuclear Safety,1970
2. Radioecological investigations of plutonium in an Arctic marine environment;Aarkrog;Health Physics,1971
3. A re-examination of plutonium at Thule, Greenland in 1970;Aarkrog,1972
4. Sources of anthropogenic radionuclides in the Southern Urals;Aarkrog;Journal of Environmental Radioactivity,1992
5. Radioactivity in polar regions - main sources;Aarkrog;Journal of Environmental Radioactivity,1994