1. Documenta Geigy, Scientific Tables;Geigy Corporation,1962
2. Changes in indoor climate after tightening of apartments;Korsgaard,1981
3. Ventilation and transfer effects in buildings measured by a gaseous tracer (Kr-85);Lundqvist,1970
4. Building Regulations;National Building Agency,1977
5. Health Aspects Related to Indoor Air Quality;World Health Organization,1979