@techreport{BarthelFranke2009,
  type      = {Working Paper},
  author    = {Barthel, Claus and Franke, Moritz},
  title     = {Analysis of proposed eco-design requirements for boilers and water heaters : paper within the framework of the {"}Material efficiency and resource conservation{"} (MaRess) project, task 14},
  series    = {Resource efficiency paper},
  volume    = {14.2},
  institution = {Wuppertal Institut f{\"u}r Klima, Umwelt, Energie},
  address   = {Wuppertal},
  url       = {https://nbn-resolving.org/urn:nbn:de:bsz:wup4-opus-43323},
  pages     = {45},
  year      = {2009},
  language  = {en}
}