@article{8910,
  author = {M. Du and J. Delos},
  title = {Effect of closed classical orbits on quantum spectra: Ionization of atoms in a magnetic field. II. Derivation of formulas},
  year = {1988},
  journal = {Physical Review A},
  volume = {38},
  pages = {1913-1930},
  month = {Jan-08-1988},
  issn = {0556-2791},
  url = {http://link.aps.org/doi/10.1103/PhysRevA.38.1913},
  doi = {10.1103/PhysRevA.38.1913},
}