„Bulletin of the Atomic Scientists”. Bulletin of the Atomic Scientists : Science and Public Affairs. Educational Foundation for Nuclear Science, Inc.: 9 decembrie 1960. ISSN0096-3402. Accesat în .
„Bulletin of the Atomic Scientists”. Bulletin of the Atomic Scientists : Science and Public Affairs. Educational Foundation for Nuclear Science, Inc.: 9 decembrie 1960. ISSN0096-3402. Accesat în .