[1] . ICRU. Radiation quantities and units. ICRU Re port 33. Bethesda, 1980.
[2] . ICRU. Determination of dose equivalents resulting from external radiation sources. ICRU report 39. Bethesda, 1985.
[3] . ICRU. Determination of dose equivalents from ex-ternal radiation sources, Part 2. ICRU Report 43. Bethesda, 1988.
[4] . ICRU. Measurement of dose equivalents from ex-ternal photon and electron radiations. ICRU Re port 47, Bethesda, 1992.
[5] . ICRP. 1990 Recommendations of the ICRP. Publi-cation 60. Annals of the ICRP 21 (1-3). New York: Pergamon Press, 1991.
[6] . ICRU. Quantities and units in radiation protection dosimetry. ICRU Report 51. Bethesda, 1993.
[7] . ICRU. The quality factor in radiation protection, ICRU Report 40. Bethesda, 1986.
[8] . ICRP. Recommendations of the ICRP. Publication 26. Annals of the ICRP (1-3). New York: Perga mon Press, 1991.