1. Harder, D.: Energiespektren schneller Elektronen in verschiedenen Tiefen, High Energy Electrons (Proc. Symp. Berlin, 1964), Springer–Verlag, Berlin, 1965, pp. 26–33.
2. Boag, J.W: Ionization chambers, in Radiation Dosimetry, Attix, F.H., Roesch, W.C. (eds.), Academic Press, New York, 1966.
3. International Commission on Radiation Units and Measurements: Determination of Absorbed Dose in a Patient Irradiated by Beams of X or Gamma Rays in Radiotherapy, ICRU Report 24, ICRU Publications, Bethesda, MD, 1976.
4. Almond, P.R., Svensson, H.: Ionization chamber dosimetry for photon and electron beams. Theoretical considerations, Acta Radiol. Ther. In: Phys. Biol. 16 (1977) 177
5. American Association of Physicists in Medicine: Specification of brachytherapy source strength, Report No. 21 by Task Group 32 of the AAPM, Nath, R., Anderson, L., Jones, D., Ling, C., Loevinger, R., Williamson, J., Hanson, W., American Institute of Physics, New York, 1987.