@book{Plum2017,
  author    = {Plum, Bernhard},
  title     = {Mein Business Plan : Praxisleitfaden f{\"u}r startups - vom Handwerksbetrieb bis zum IT-Unternehmen},
  publisher = {Haufe},
  address   = {Freiburg},
  isbn      = {978-3-648-09448-8},
  pages     = {282},
  year      = {2017},
  language  = {de}
}
@book{PlumGehrerSchmidt2016,
  author    = {Plum, Bernhard and Gehrer, Michael and Schmidt, J{\"u}rgen},
  title     = {Existenzgr{\"u}ndung f{\"u}r Hochschulabsolventen},
  publisher = {Haufe Gruppe},
  isbn      = {978-3-648-07911-9},
  pages     = {283},
  year      = {2016},
  language  = {de}
}