@book{Toennissen2011,
  author    = {T{\"o}nnissen, Stefan},
  title     = {Revision der IT-Governance mit CoBiT : Leitfaden f{\"u}r die Pr{\"u}fungspraxis},
  publisher = {Erich Schmidt Verlag},
  address   = {Berlin},
  isbn      = {978-3-503-13012-2},
  publisher      = {FH M{\"u}nster - University of Applied Sciences},
  pages     = {323},
  year      = {2011},
  language  = {de}
}
@article{Toennissen2010,
  author    = {T{\"o}nnissen, Stefan},
  title     = {Entwicklung eines Modells zur Pr{\"u}fung der ITGovernance in Anlehnung an den Standard CoBiT},
  series = {Zeitschrift f{\"u}r Interne Revision (ZIR)},
  journal   = {Zeitschrift f{\"u}r Interne Revision (ZIR)},
  issn      = {1868-7814},
  pages     = {35 -- 39},
  year      = {2010},
  language  = {de}
}