1. European Commision Europe 2020 targets 2011
2. ASHRAE Thermal Environmental Conditions for Human Occupancy, Atlanta GA, American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE Standard 55-2004) 2004
3. ISO Ergonomics of the thermal environment - Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria 2005