@conference{5676,
  author = {J. Delos},
  title = {Periodic orbits, recurrences and bifurcations in atomic spectra},
  year = {1995},
  publisher = {AIP},
  address = {Williamsburg, Virginia (USA)},
  url = {http://link.aip.org/link/APCPCS/v334/i1/p305/s1\&Agg=doi},
  doi = {10.1063/1.48193},
}