@misc{indiciaeb55c974a8c87,
  title = {Configuration-average energy shift owing to configuration interaction.},
  author = {J Oreg and WH Goldstein and A Bar-Shalom and M Klapisch},
  year = {1989},
  doi = {10.1103/physreva.39.4599},
  url = {https://pubmed.ncbi.nlm.nih.gov/9901810/},
  note = {Source identifier: 9901810}
}