@article{WorseckProchaskaMcQuinnetal.2011,
  author    = {Gabor Worseck and J. Xavier Prochaska and Matthew McQuinn and Aldo Dall'Aglio and Cora Fechner and Joseph F. Hennawi and Dieter Reimers and Philipp Richter and Lutz Wisotzki},
  title     = {The end of Helium Reionization at z similar or equal to 2.7 Inferred from cosmic variance in HST/COS He II Ly alpha Absorption spectra},
  journal   = {The astrophysical journal : an international review of spectroscopy and astronomical physics ; Part 2, Letters},
  volume    = {733},
  number    = {2},
  doi       = {10.1088/2041-8205/733/2/L24},
  year      = {2011},
}