Two-electron self-energy contribution to the ground-state energy of helium-like ions

@article{Yerokhin1997TwoelectronSC,
  title={Two-electron self-energy contribution to the ground-state energy of helium-like ions},
  author={Vladimir A. Yerokhin and A. N. Artemyev and Vladimir M. Shabaev},
  journal={Physics Letters A},
  year={1997},
  volume={234},
  pages={361-366}
}
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