Gasiūnas, Kęstutis, Albinas Mastauskas, and Gendrutis Morkūnas. 1998. “Concentrations of Indoor and Soil Radon in Lithuania/Radonas Grunto Ore Ir Pataleose Lietuvoje”. Journal of Civil Engineering and Management 4 (4), 316-21. https://doi.org/10.3846/13921525.1998.10531424.