@conference{8784,
  author = {A. Pradhan},
  title = {Recommended data for electron impact excitation of helium and helium-like ions},
  year = {1987},
  publisher = {Queen\textquoterights University of Belfast},
  address = {St. Catherine\textquoterights College, Oxford},
  note = {JILA Pub. 3742},
}