@article{NSR1973BL05,
  author="R. C. {Block} and R. W. {Hockenbury} and R. E. {Slovacek} and E. B. {Bean} and D. S. {Cramer}",
  title="Subthreshold Fission Induced by Neutrons on $^{238}$U",
  journal="Phys.Rev.Lett.",
  year=1973,
  volume="31",
  pages="247"
}
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