@article{4661,
  author = {M. Domke and C. Xue and A. Puschmann and T. Mandel and E. Hudson and D. Shirley and G. Kaindl and Chris Greene and H. Sadeghpour and H. Petersen},
  title = {Extensive double-excitation states in atomic helium},
  year = {1991},
  journal = {Physical Review Letters},
  volume = {66},
  pages = {1306-1309},
  month = {Jan-03-1991},
  issn = {0031-9007},
  doi = {10.1103/PhysRevLett.66.1306},
}