@article{6608,
  author = {Mark Fardal and M. Giroux and J. Shull},
  title = {The High-Redshift He II Gunn-Peterson Effect: Implications and Future Prospects},
  year = {1998},
  journal = {The Astronomical Journal},
  volume = {115},
  pages = {2206-2230},
  month = {Jan-06-1998},
  issn = {00046256},
  url = {http://stacks.iop.org/1538-3881/115/i=6/a=2206},
  doi = {10.1086/300359},
}