@article{Richter2012,
  author    = {Philipp Richter},
  title     = {Cold gas accretion by high-velocity clouds and their connection to QSO Absorption-line systems},
  journal   = {The astrophysical journal : an international review of spectroscopy and astronomical physics},
  volume    = {750},
  number    = {2},
  doi       = {10.1088/0004-637X/750/2/165},
  year      = {2012},
}