@article{8909,
  author = {M. Du and J. Delos},
  title = {Effect of closed classical orbits on quantum spectra: Ionization of atoms in a magnetic field. I. Physical picture and calculations},
  year = {1988},
  journal = {Physical Review A},
  volume = {38},
  pages = {1896-1912},
  month = {Jan-08-1988},
  issn = {0556-2791},
  url = {http://link.aps.org/doi/10.1103/PhysRevA.38.1896},
  doi = {10.1103/PhysRevA.38.1896},
}