Источник данных #5504
@article{10559EL, journal={J. Phys. Chem. Ref. Data}, volume={19}, pages={527--616}, title={Energy Levels of Copper, Cu~I through Cu~XXIX}, author={J. Sugar and A. Musgrove}, year={1990}, doi={10.1063/1.555855}, notes={NIST compilation}}
@article{10559EL, journal={J. Phys. Chem. Ref. Data}, volume={19}, pages={527--616}, title={Energy Levels of Copper, Cu~I through Cu~XXIX}, author={J. Sugar and A. Musgrove}, year={1990}, doi={10.1063/1.555855}, notes={NIST compilation}}