Parkins, William E. (1 de maio de 2005). «The Uranium Bomb, the Calutron, and the Space-Charge Problem». Physics Today. 58 (5): 45–51. Bibcode:2005PhT....58e..45P. doi:10.1063/1.1995747
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Parkins, William E. (1 de maio de 2005). «The Uranium Bomb, the Calutron, and the Space-Charge Problem». Physics Today. 58 (5): 45–51. Bibcode:2005PhT....58e..45P. doi:10.1063/1.1995747