@article{11609,
  author = {D. Beck},
  title = {Relativistic and Correlation Effects for Optical Levels of Large Atomic Systems: Application to Tl ii},
  year = {1969},
  journal = {The Journal of Chemical Physics},
  volume = {51},
  pages = {2171},
  month = {Jan-01-1969},
  issn = {00219606},
  url = {http://link.aip.org/link/?JCP/51/2171/1\&Agg=doi},
  doi = {10.1063/1.1672313},
}