| Reference Label | Details |
|---|---|
| Moore 1970 | C. E. Moore, "Ionization Potentials and Ionization Limits Derived from Analyses of Optical Spectra", NSRDS-NBS 34, National Bureau of Standards: Washington, DC 1970 |
| Lotz 1967 | W. Lotz, J. Opt. Soc. Amer. 57, 873878 (1967) Ionization Potentials of Atoms and Ions from Hydrogen to Zinc |