1. A. HANSON, R. SERBER, and J. WILLIAMS, “Multiplication of Large 25 Spheres,” LAMS-230, Los Alamos Scientific Laboratory (1945).
2. H. ANDERSON, “Neutron Multiplication in Spheres of 25,” LA-402, Los Alamos Scientific Laboratory (1945).
3. R. CARTER, J. HINTON, and L. KING, “Critical Mass Measurements for a 25 Sphere in Tu and WC Tampers,” LA-442, Los Alamos Scientific Laboratory (1945).
4. T. McLAUGHLIN et al. “A Review of Criticality Accidents,” LA-13638, Los Alamos National Laboratory (2000).