@misc{indiciae008b3f32c561,
  title = {Simple rule for complex quantum systems.},
  author = {VM Akulin},
  year = {1993},
  doi = {10.1103/physreva.48.3532},
  url = {https://pubmed.ncbi.nlm.nih.gov/9910017/},
  note = {Source identifier: 9910017}
}