@article{NSR1987PE13,
  author="J. {Penninga} and W. H. A. {Hesselink} and A. {Balanda} and A. {Stolk} and H. {Verheul} and J. {van Klinken} and H. J. {Riezebos} and M. J. A. {de Voigt}",
  title="Proton Particle-Hole States and Collective Excitations in $^{196}$Pb",
  journal="Nucl.Phys.",
  year=1987,
  volume="A471",
  pages="535"
}
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