@article{NSR1990VA10,
  author="S. I. {Vasilev} and A. A. {Klimenko} and S. B. {Osetrov} and A. A. {Pomansky} and A. A. {Smolnikov}",
  title="Observation of the Excess of Events in the Experiment on the Search for a Two-Neutrino Double Beta Decay of $^{100}$Mo",
  journal="Pisma Zh.Eksp.Teor.Fiz.",
  year=1990,
  volume="51",
  pages="550"
}
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