@techreport{LangrockWiehler2003,
  type      = {Working Paper},
  author    = {Langrock, Thomas and Wiehler, Hans Albrecht},
  title     = {Nationale Ausgleichsprojekte (NAP) als Erg{\"a}nzung des EU-Emissionshandels},
  series    = {Policy Paper / Wuppertal Institut f{\"u}r Klima, Umwelt, Energie},
  volume    = {2003,3},
  institution = {Wuppertal Institut f{\"u}r Klima, Umwelt, Energie},
  address   = {Wuppertal},
  pages     = {11},
  year      = {2003},
  language  = {de}
}