1. J. MATTINGLY, “Polyethylene-Reflected Plutonium Metal Sphere: Subcritical Neutron and Gamma Measurements,” Technical Report SAND2009-5804, Sandia National Laboratories (2009).
2. N. ENSSLIN et al. “Application Guide to Neutron Multiplicity Counting,” LA-13422-M, Los Alamos National Laboratory (1998).
3. Feynman variance-to-mean in the context of passive neutron coincidence counting
4. R. SERBER, “The Definition of ‘Neutron Multiplication’,” LA-335, Los Alamos National Laboratory (1945).