1. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), 1988. ASHRAE Equipment Handbook. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Atlanta, pp. 10.1–10.11
2. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), 1989. Ventilation for Acceptable Indoor Air Quality, ASHRAE Standard 62-1989. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Atlanta, 1989, pp. 8, 9
3. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), 1991. ASHRAE Handbook. Heating, Ventilating and Air-Conditioning Applications, SI Edition. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Atlanta, pp. 7.2, 9.2, 11.3
4. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), Standard. Ventilation for Acceptable Indoor Air Quality. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Atlanta, p. 3
5. American Society for Testing and Materials (ASTM), 1996. Provisional Standard Guide for Using Indoor Carbon Dioxide Concentrations to Evaluate Indoor Air Quality and Ventilation, Designation: PS 40-95. West Conshohocken, PA