@misc{indiciae5a771703b1cd,
  title = {Quantum-defect parametrization of perturbative two-photon ionization cross sections.},
  author = {MG Fink and P Zoller},
  year = {1989},
  doi = {10.1103/physreva.39.2933},
  url = {https://pubmed.ncbi.nlm.nih.gov/9901587/},
  note = {Source identifier: 9901587}
}