1. D. Reily, et al., Passive Nondesructive Assay of Nuclear Materials, Los Alamos National Laboratory (March 1991).
2. Natural Decay Series: Uranium, Radium and Thorium, in Human Health Sheet, E. Argonne National Laboratory, Editor 2005.
3. Nuclear Fuel Cycle Information System. 2009: IAEA.
4. E. Proctor, K. R. Pohl, Comparison of Several Detector Technologies for Measurement of Special Nuclear Material (2003).
5. P. A. Russo, D. T. Vo, Gamma-Ray Detectors for Nondestructive Analysis, PANDA Addendum (2007).