1. Calculating the dimension of attractors from small data sets;Abraham;Phys. Lett.,1986
2. Comportamento frattale delle variazioni di radon negli interni;Ciancia;Radiol. Med.,1992
3. Radon in Indoor Air;Commission of the European Communities;Report No. 1, EUR 11917 EN,1989
4. Indoor Radon and Decay Products: Concentrations, Causes, and Control Strategies;Department of Energy,1990