1. ASHRAE Fundamentals (1993). Chapter 8. Physiological principles and thermal comfort. Atlanta, GA:American Society of Heating, Refrigerating, and Air-Conditioning Engineers, pp. 8.1–8.29
2. ANSI/IEEE C95.1 (1992) IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz.. New York: Institute of Electrical and Electronics Engineers.