Géczi, Gábor, József Benécs, Krisztina Kristóf, and Márk Horváth. 2018. “High Concentrations of Radon and Carbon Dioxide in Energy-Efficient Family Houses Without Heat Recovery Ventilation”. Journal of Environmental Engineering and Landscape Management 26 (1), 64-74. https://doi.org/10.3846/16486897.2017.1347095.