@article{Natarajan:2010Xg,
  author = "Natarajan, Aravind  and  Schwarz, Dominik J.",
  title = "{Dark Matter Annihilation and Hydrogen 21cm Cosmology}",
  doi = "10.22323/1.097.0025",
  journal = "PoS",
  year = 2010,
  volume = "Cosmology2009",
  pages = "025"
}