@book{Wisotki2010,
  author    = {Lutz Wisotki},
  title     = {Galaxien, Schwarze L{\"o}cher, Quasare : Antrittsvorlesung 2010-12-08},
  url       = {http://info.ub.uni-potsdam.de/multimedia/show_multimediafile.php?mediafile_id=242},
  year      = {2010},
}