1. Photometry. Terms and Definitions, GOST-26148-84, Appendix 1 (1992).
2. L. R. Koller, Ultraviolet Radiation (Wiley, New York, 1965).
3. K. L. Coulson, Solar and Terrestrial Radiation (Academic, New York, 1975).
4. E. E. Anderson, Fundamentals of Solar Energy Conversion (Addison-Wesley, Reading, MA, 1983).
5. WHO, Environmental Hygienic Criterions 1984. Ultraviolet Radiation, WHO Environmental Health Criterion 160 (International Fadiation Protection Association and WHO, Geneva, 1994).