1. G. F. Knoll. ‘Radiation Detection and Measurements,’ 3rd Ed., John Wiley & Sons, New York, Chap. 5 (1999).
2. Joshep A. Decampo et al. ‘High pressure argon ionization chamber systems for the measurement of environmental radiation exposure rates,’ U.S. Atomic Energy Commission, New York, HASL-260 (1972.)