ASTM E2121-13, Standard Practice for Installing Radon Mitigation Systems in Existing Low-Rise Residential Buildings, ASTM International, West Conshohocken, PA, 2013, www.astm.org
ASTM E1465-08, Standard Practice for Radon-reducing Features in New Homes, ASTM International, West Conshohocken, PA, 2008, www.astm.org