@article{9249,
  author = {Michael Fink and Peter Zoller},
  title = {Quantum-defect parametrization of perturbative two-photon ionization cross sections},
  year = {1989},
  journal = {Physical Review A},
  volume = {39},
  pages = {2933-2947},
  month = {Jan-03-1989},
  issn = {0556-2791},
  doi = {10.1103/PhysRevA.39.2933},
}