1. Akerblom G, Anderson P, Clavensjo B (1995) Soil gas radon—a source for indoor radon daughters. Radiat Prot Dosim 7: 449–454
2. Andersen CE, Ulbak K, DamkjærA Gravesen P (2001) Radon in Danish dwellings (in Danish). Mapping of national, regional and municipality values. National Board of Health, National Board of Health National Institute of Radiation Hygiene, Copenhagen
3. ANPA (2000) Sistema informativo territoriale per la valutazione del potenziale di esalazione di radon dal suolo. Serie stato dell’ambiente 9/2000
4. Apte MG, Price PN, Nero AV, Revzan KL (1999) Predicting New Hampshire indoor radon concentrations from geologic information and other covariates. Environ Geol 37: 181–194
5. Arbia G (1989) Spatial data configuration in statistical analysis of regional economic and related problems. Kluwer, Dordrecht