@techreport{HinterbergerKranendonkWelfensetal.1993,
  type      = {Working Paper},
  author    = {Hinterberger, Friedrich and Kranendonk, Sascha and Welfens, Maria J. and Schmidt-Bleek, Friedrich},
  title     = {Increasing resource productivity through eco-efficient services},
  series    = {Wuppertal Papers},
  volume    = {13},
  institution = {Wuppertal Institut f{\"u}r Klima, Umwelt, Energie},
  address   = {Wuppertal},
  pages     = {23},
  year      = {1993},
  language  = {en}
}