@misc{indiciaeea1507c3e83f,
  title = {Two-electron excitations in atomic calcium. I.},
  author = {CH Greene and L Kim},
  year = {1987},
  doi = {10.1103/physreva.36.2706},
  url = {https://pubmed.ncbi.nlm.nih.gov/9899175/},
  note = {Source identifier: 9899175}
}