@misc{indiciaeb7323cb4b874,
  title = {Gauge aspects in multichannel multiphoton ionization.},
  author = {C Leone and S Bivona and R Burlon and F Morales and G Ferrante},
  year = {1989},
  doi = {10.1103/physreva.40.1828},
  url = {https://pubmed.ncbi.nlm.nih.gov/9902340/},
  note = {Source identifier: 9902340}
}