1. R.T. Kouzes, The 3He Supply Problem, PNNL-18388, 2009.
2. T.M. Persons, G. Aloise, Neutron Detectors: Alternatives to Using Helium-3, Report to Congress, Government Accountability Office Technology Assessment, 2011.
3. The Helium-3 Shortage: Supply, Demand and Options for Congress;Shea,2010
4. N. Ensslin, M. Krick, M. Pickrell, D. Reilly, J. Stewart Chapter 6. Passive Neutron Multiplicity Counting, Passive Nondestructive Assay of Nuclear Materials—2007 Addendum, Los Alamos National Laboratory Report, LA-UR-07-1402, 2007.