@article{NSR1979ZA03,
  author="G. J. {Zaal} and W. {Hogervorst} and E. R. {Eliel} and K. A. H. {van Leeuwen} and J. {Blok}",
  title="A High Resolution Study of the Transitions 4f$^{7}$ 6s$^{2}$ $\to$ 4f$^{7}$ 6s6p in the Eu I-Spectrum",
  journal="Z.Phys.",
  year=1979,
  volume="A290",
  pages="339"
}
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