@incollection{CzarneckiBensberg2019,
  author    = {Czarnecki, Christian and Bensberg, Frank},
  title     = {Telekommunikationsunternehmen, Anwendungssysteme f{\"u}r},
  series = {Enzyklop{\"a}die der Wirtschaftsinformatik},
  booktitle = {Enzyklop{\"a}die der Wirtschaftsinformatik},
  publisher = {Gito},
  address   = {Berlin},
  pages     = {1 -- 3},
  year      = {2019},
  language  = {de}
}