1. Åkerblom G. 1999. Radon Legislation and National Guidelines. SSI Report 99:18. Swedish Radiation Protection Institute (Statens Stralskyddsinstitut), Stockholm Sweden.
2. Åkerblom G. , Mjönes L. , Annanmäki M. , Magnusson S. , Strand T. & Ulbak K. 2000. Naturally Occurring Radioactivity in the Nordic Countries – Recommendations. The Radiation Protection Authorities in Denmark, Finland, Iceland, Norway and Sweden.
3. Appleton J.D. , Jones D.G. , Miles J.C.H. & Scivyer C. In press. Radon gas hazard. In: Giles D.P. & Griffiths J.S. (eds) Geological Hazards in the UK: Their Occurrence, Monitoring and Mitigation. Geological Society, London, Engineering Geology Special Publications.
4. Argonne National Laboratory 2005. Human Health Factsheet, May. Argonne National Laboratory, Lemont, IL, USA.
5. Seasonal variation in radon concentration of 3000 dwellings with model comparisons;Radiation Protection Dosimetry,1995