@article{7253,
  author = {A. Pradhan and David Norcross and David Hummer},
  title = {Rate coefficients for electron impact excitation of helium-like ions},
  year = {1981},
  journal = {The Astrophysical Journal},
  volume = {246},
  pages = {1031},
  month = {Jan-06-1981},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1981ApJ...246.1031P},
  doi = {10.1086/158998},
}