@misc{indiciaee35341deab8a,
  title = {Strongly perturbed quantum systems.},
  author = {M Frasca},
  year = {1993},
  doi = {10.1103/physreva.47.2374},
  url = {https://pubmed.ncbi.nlm.nih.gov/9909194/},
  note = {Source identifier: 9909194}
}