References
- ICRU. Average Energy Required to Produce an Ion Pair. ICRU Report No. 31, International Commission on Radiation Units and Measurements, Bethesda, Maryland 1979
- ICRU. Stopping Powers for Electrons and Positrons. ICRU Report No. 37, International Commission of Radiation Units and Measurements, Bethesda, Maryland 1984
- Wyckoff H.O., Attix F.H. Design of Free-air Ionization Chambers. National Bureau of Standards Handbook 64, 1957; 3–3