@article{9011,
  author = {G. Alber and Th. Haslwanter and Peter Zoller},
  title = {One-photon resonant two-photon excitation of Rydberg series close to threshold},
  year = {1988},
  journal = {Journal of the Optical Society of America B},
  volume = {5},
  pages = {2439},
  month = {Jan-01-1988},
  issn = {0740-3224},
  doi = {10.1364/JOSAB.5.002439},
}