@book{Sauer2018,
  author    = {Sauer, Dirk},
  title     = {Vierte Lange Nacht der Prozessverbesserung und Organisationsentwicklung},
  publisher = {Lit Verlag},
  address   = {Berlin},
  isbn      = {978-3-643-14224-5},
  pages     = {215},
  year      = {2018},
  language  = {de}
}
@book{Ryba2018,
  author    = {Ryba, Michael},
  title     = {SeniorenCampus 1},
  publisher = {Lit Verlag},
  address   = {M{\"u}nster},
  isbn      = {978-3-643-13982-5},
  pages     = {149},
  year      = {2018},
  language  = {de}
}