1. 1. Sykora I, Froehlich K. Radionuclides as tracers of atmospheric process. In: Froehlich K, editor. Environmental Radionuclides: Tracers and Timers of Terrestrial Processes, Oxford, Elsevier; 2010. pp. 51-88.
2. 2. Martin JE. Physics for Radiation Protection. 2nd ed. Weinheim, WILEY-VCH. 2006. 288-289.
3. 3. Harley NH, Harley JH. Potential lung cancer risk from indoor radon exporsure. Cancer J Clin 1990; 40(5): 265-275.
4. 4. International Commission on Radiological Protection (ICRP). ICRP Publication 65: Protection Against Radon-222 at Home and at Work. Ann. 1993; 23(2).
5. 5. Zeeb H, Shannoun F. WHO Handbook on Indoor Radon: a Public Health Perspective. Geneva, Switzerland, World Health Organization 2009.