@book{HaferHenzeMattheetal.2014,
  author    = {J{\"o}rg Hafer and Luise Henze and Frederic Matth{\´e} and Marlen Schumann},
  title     = {Bestandsaufnahme E-Learning an der Universit{\"a}t Potsdam},
  number    = {1},
  year      = {2014},
}