@article{8244,
  author = {R. Christensen and David Norcross},
  title = {Electron-impact excitation of Li ii: A model study of wave-function and collisional approximations and of resonance effects},
  year = {1985},
  journal = {Physical Review A},
  volume = {31},
  pages = {142-151},
  month = {Jan-01-1985},
  issn = {0556-2791},
  doi = {10.1103/PhysRevA.31.142},
}