Robuta

https://www.nist.gov/publications/circular-bureau-standards-no-488-section-1an-ultraviolet-multiplet-table-spectra

https://www.kth.se/en/om/2.266/multiplet-computation-methods-for-core-level-x-ray-spectroscopy-of-transition-metal-and-rare-earth-elements-1.1256839?date=2023-06-13&orgdate=2023-06-08&length=1&orglength=0