@book{JanzLichtEblingetal.1999,
  author    = {Janz, Norbert and Licht, Georg and Ebling, G{\"u}nther and Niggemann, Hiltrud},
  title     = {Innovation in the Service Sector. Selected Facts and Some Policy Conclusions / Licht, G., G. Ebling, N. Janz, H. Niggemann},
  publisher = {European Commission},
  address   = {Luxembourg},
  year      = {1999},
  language  = {en}
}
@book{JanzLicht2002,
  author    = {Janz, Norbert and Licht, Georg},
  title     = {Innovation Activities and European Patenting of German Firms. A Panel Data Analysis / Janz, N., G. Licht},
  pages     = {mimeo},
  year      = {2002},
  language  = {en}
}