1. K. BÖHNEL, “Die Plutoniumbestimmung in Kernbrennstoffen mit der Neutronenkoinzidenzmethode,” KfK-2203, Kernforschungszentrum Karlsruhe (1975);
2. M. S. ZUCKER and A. FAINBERG, “Assay of Low-Enriched Uranium Using Spontaneous Fission Neutrons,” BNL-27664, Brookhaven National Laboratory (1980).
3. M. S. KRICK, “Neutron Multiplication Corrections for Passive Thermal Neutron Well Counters,” LA-8460-MS, Los Alamos National Laboratory (1980).