1. American National Standards Institute/Institute of Electrical and Electronics Engineers, American National Standard Performance Criteria for Hand-Held Instruments for the Detection and Identification of Radionuclides, ANSI N42.34-2003.
2. L. Pibida, L. Karam, M. Uterweger, Results of Test and Evaluation of Commercially Available Radionuclide Identifiers for the Department of Homeland Security, NIST Report, May 18, 2005.
3. K. J. Hofstetter, D. M. Beals, J. Radioanal. Nucl. Chem., 263 (2005) 171.
4. D. L. Dunn, C. R. Goetzman, M. Farrar, K. Hofstetter, D. Beals, P. Heimberg, T. Haard, J. Mattson, E. Moore, R. Sundberg, Maritime Background Radiation Program (MBRP), US Coast Guard Research and Development Center, Department of Homeland Security, Report in process.
5. D. J. Mitchell, H. M. Sanger, K. W. Marlow, Nucl. Instr. Meth., A276 (1989) 547.