@article{4452,
  author = {A. Maquet and John Cooper},
  title = {Low-frequency approximation for simultaneous electron-photon excitation of atoms},
  year = {1990},
  journal = {Physical Review A},
  volume = {41},
  pages = {1724-1727},
  month = {Jan-02-1990},
  issn = {1050-2947},
  doi = {10.1103/PhysRevA.41.1724},
}