@incollection{HorsterP{\"u}schel2009,
  author    = {Horster, Bettina and P{\"u}schel, Steffen},
  title     = {Mobile Business Outlook 2008-2010},
  series = {Innovative mobile Technologien und Anwendungen},
  publisher = {Lit},
  address   = {Berlin},
  pages     = {10},
  year      = {2009},
  language  = {de}
}