@book{JanzEblingGottschalketal.2005,
  author    = {Norbert Janz and G{\"u}nther Ebling and Sandra Gottschalk and Georg Licht},
  title     = {Services in the Future. Innovation Activities in the Service Sector. Survey 1998 (English translation) / Janz, N., G. Ebling, S. Gottschalk, G. Licht und H. Niggemann},
  year      = {2005},
}