NIST Energy Levels and Wavelengths Bibliographic Reference # 12128
QED Calculation of the n = 1 and n = 2 Energy Levels in He-like Ions,
A. N. Artemyev, V. M. Shabaev, V. A. Yerokhin, G. Plunien, and G. Soff,
Phys. Rev. A 71, 062104 (2005)
DOI:
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