@article{Hartung2003,
  author    = {Hartung, Frank},
  title     = {Mobile DRM Introduction: The Need for Mobile DRM},
  series = {Digital Rights Management : Technological, Economic, Legal and Political Aspects / Becker, Eberhard [u.a.]},
  journal   = {Digital Rights Management : Technological, Economic, Legal and Political Aspects / Becker, Eberhard [u.a.]},
  publisher = {Springer},
  address   = {Berlin},
  pages     = {138 -- 149},
  year      = {2003},
  language  = {en}
}