@article{142271,
  author = {William Martin and J Sugar},
  title = {Designations of ds<sup>2</sup>p Energy Levels in Neutral Zirconium, Hafnium, and Rutherfordium (Z=104)},
  year = {1996},
  number = {53},
  month = {1996-01-01},
  publisher = {Physical Review A (Atomic, Molecular and Optical Physics)},
  language = {en},
}