1. Phosphogypsum – an overview;Ferguson,1988
2. Environmental impacts of phosphogypsum;Rutherford;Sci. Total Environ.,1994
3. NCRP, Exposure of the population in the United States and Canada from natural background radiation, NCRP Report No. 94, National Council of Radiation Protection and Measurements, Bethesda, MD, 1997
4. Generalized source term for the multiphase radon transport equation;Rogers;Health Phys.,1993
5. Multiphase radon generation and transport in porous materials;Rogers;Health Phys.,1991