@article{7152,
  author = {A. Pradhan and David Norcross and David Hummer},
  title = {Cross sections and excitation rates for electron collisions with heliumlike ions},
  year = {1981},
  journal = {Physical Review A},
  volume = {23},
  pages = {619-631},
  month = {Jan-02-1981},
  issn = {0556-2791},
  doi = {10.1103/PhysRevA.23.619},
}